Japanese invasion of Manchuria

Background

Following victory in the Russo-Japanese War in 1905, Japan obtained the leasehold of the Kwantung Leased Territory on the Liaodong Peninsula and acquired the South Manchuria Branch of the Chinese Eastern Railway between Lushun and Changchun, along with attached coal mining concessions, under the Treaty of Portsmouth.^[5] To administer these holdings and protect the railway zone, the Japanese government instituted the Kwantung Government-General (Kwantung Agency) and garrisoned the Kwantung Army.^[5] Japan exercised informal rule over Manchuria.^[6][7] The South Manchuria Railway carried raw materials from Manchuria to Korea, annexed by Japan in 1910, from where they were shipped to Japan. Colonial financial investments in the territory expanded significantly; by the close of the 1920s, 39.4 percent of all Japanese colonial overseas financing was concentrated in Manchuria.

The collapse of the Qing dynasty following the 1912 Xinhai Revolution led to the fragmentation of China into rival warlord factions. In 1915, Japan presented the Twenty-One Demands to China to secure its continental treaties and rights, but the Chinese government countered with internal regulations that diminished their practical force, while domestic boycotts and anti-Japanese agitation spread into Manchuria.^[8] In Japanese politics, two divergent diplomatic stances emerged regarding Manchuria: Shidehara diplomacy, associated with Foreign Minister Kijūrō Shidehara and the Kenseikai (later Rikken Minseitō), which viewed China and Manchuria as an integral commercial market and practiced non-intervention unless Japanese lives or treaties were directly attacked; and Tanaka diplomacy, associated with Prime Minister Giichi Tanaka and the Rikken Seiyūkai, which regarded Manchuria as a strategic base against the Soviet Union and communism, warranting active military intervention to safeguard regional stability.^[9][10]

The moderate deployment policy of the Minseitō cabinets between 1924 and 1927 drew sharp criticism from military officers and conservative politicians, particularly after Japanese residents suffered casualties during the 1927 Nanjing incident, prompting the cabinet to resign.^[11] Tanaka took power and dispatched expeditions to Shandong. The Imperial Japanese Army had cultivated ties with the Manchurian warlord Zhang Zuolin since around 1916 to ensure regional stability, but Zhang harbored ambitions to control northern and central China.^[12] When Zhang advanced to Beijing in 1928 and clashed with Chiang Kai-shek's Northern Expedition, Tanaka warned both parties against bringing combat into Manchuria and moved Kwantung Army units toward Shenyang to disarm retreating forces.^[13] Zhang agreed to withdraw, but on 4 June 1928, radical Kwantung Army officers led by Colonel Daisaku Komoto detonated a bomb beneath Zhang's train at Huanggutun, killing him in an effort to remove Zhang and bring Manchuria entirely under Japanese possession.^[13]

The assassination failed to achieve its plotters' aims. Zhang's son and successor, Zhang Xueliang, chose to ally with Chiang Kai-shek rather than submit to Tokyo. On 29 December 1928, Zhang carried out the Northeast Flag Replacement, bringing Manchuria formally under the authority of the Nationalist government in Nanjing.^[14] The Tanaka cabinet collapsed in July 1929 amid fallout from the assassination investigation. A restored Minseitō government under Osachi Hamaguchi resumed Shidehara's non-interventionist policy.^[14] After the flag replacement, the Chinese side founded the Liaoning National Foreign Affairs Association and spread Chinese nationalism; under Zhang Xueliang's direction, Chinese landlords ended contracts with Japanese and Korean tenant farmers, and Zhang began building rail lines parallel to the South Manchuria Railway in direct competition with it. By July 1931 the unresolved disputes were said to number five hundred.

Within the Japanese military, structural and ideological shifts intensified. Beginning with the secret Baden-Baden agreement of 1921, young and mid-level officers organized to dismantle the traditional Chōshū faction dominance and build a total war apparatus.^[15] Study circles including the Futabakai and Mokuyōkai merged in 1929 into the Issekikai. As early as 1 March 1929, the Mokuyōkai resolved that Japan had to secure possession of Manchuria to guarantee raw materials for future total war, a doctrine adopted across the Issekikai, whose members held key staff postings in the War Ministry and General Staff by August 1931.^[15]

The Great Depression, which began in October 1929, plunged Japan into a severe slump that reached into farming villages, and national socialist ideas spread on the political right. Word of rural distress reached junior officers through soldiers from those villages. Naval limits set by the 1922 Washington Naval Treaty and the 1930 London Naval Treaty set the military against the Diet, and the London treaty led to the dispute over infringement of the prerogative of supreme command. In 1930, radical officers formed the secret Sakurakai (Cherry Blossom Society) under Lieutenant Colonel Kingoro Hashimoto. In March 1931, they prepared a coup d'état to overthrow the civilian government and install War Minister Kazushige Ugaki, though Ugaki halted the plot before execution.

Prelude to Invasion

In July 1931, an altercation erupted between Chinese and Korean farmers over the construction of an irrigation ditch on Chinese-owned land in Wanpaoshan near Changchun. Although the Wanpaoshan incident involved no fatalities or serious physical wounds, Japanese extremists and the imperial press in Japan and Korea used the confrontation to stir up anti-Chinese sentiment.^[16] The incident provoked anti-Chinese riots in Korea, further escalating mutual hostilities across the frontier.

Operating in the spirit of gekokujō (insubordination where juniors overturn seniors), Kwantung Army Senior Staff Officer Colonel Seishirō Itagaki and Operations Staff Officer Lieutenant Colonel Kanji Ishiwara devised an independent plan to stage a military incident that would trigger the occupation of Manchuria.^[17][18] Ishiwara and Itagaki calculated two primary objectives: first, establishing a defensive line against the Soviet Union by occupying northern Manchuria and pushing the frontier to natural barriers like the Amur River and Khingan mountains; second, acquiring industrial resources to prepare Japan for an eventual global war against the United States while solving domestic shortages and population pressure.^[18] In mid-September 1931, the Kwantung Army command altered its initial plan of direct annexation toward the creation of an ostensibly independent puppet regime, drafting a framework in October to establish regional administrations run by compliant warlords.^[19]

Rumors of an imminent expedition to Manchuria circulated widely in Tokyo during August and September 1931, with members of the civilian government repeatedly questioning the army regarding military intentions.^[20] Central army authorities initially planned an operation for 28 August, but later rescheduled it for September. Kwantung Army conspirators secretly transported two 24-centimeter heavy siege howitzers into Shenyang and carried out extensive night-assault training exercises in anticipation of operations against the larger Chinese garrison.^[2][21]

The Mukden Incident

On the night of 18 September 1931, at approximately 10:20 pm, an explosion occurred along a section of the South Manchuria Railway at Liutiaohu, situated just outside Shenyang and several kilometers from the site of the 1928 Huanggutun bombing. The demolition was coordinated by Major Tadashi Hanaya of the Mukden Special Service Agency and Captain Shintaro Imada, with a squad led by First Lieutenant Suemori Komoto carrying out the placement.^[21][22] The detonation was minor, damaging only a 1.5-meter section of track on one side, and caused so little destruction that the Changchun southbound express train passed over the spot without disruption, arriving at Shenyang station on schedule at 10:30 pm.^[23]

Kwantung Army headquarters declared that Chinese Northeastern Army troops had carried out an act of sabotage against the railway. Using this claim as a pretext, Japanese garrison troops immediately launched attacks on the nearby Chinese barracks at Beidaying, where approximately 7,000 Chinese soldiers were stationed. Zhang Xueliang, who was then in Beijing receiving medical care and conferring with government figures, had ordered his forces to maintain strict non-resistance to avoid Japanese provocation, believing the Kwantung Army was staging a local clash rather than a total invasion.^[21] Japanese artillery stationed at the officers' club opened fire on the barracks, and approximately 500 Japanese soldiers assaulted the position. The surprised Chinese forces offered limited defense before retreating. Japanese casualties were two dead, while Chinese fatalities totaled approximately 300 soldiers.^[21]

Initial Military Advances and the Tokyo Government Crisis

On 18 September 1931, Imperial General Headquarters in Tokyo adopted a policy of localizing the confrontation and dispatched an order to that effect to the Kwantung Army command. Kwantung Army Commander-in-Chief General Shigeru Honjō disregarded the directive, ordering a full offensive along the entire length of the South Manchuria Railway. Lieutenant General Jirō Tamon, commanding the 2nd Division, dispatched columns along the railway corridor, securing nearly every town along its 1,175-kilometer span in several days.^[2][24]

In the early hours of 19 September, the Japanese 29th Infantry Regiment entered Mukden, breached the inner walled fortifications, and occupied key government and military compounds.^[25] Colonel Kenji Doihara of the Special Service Agency assumed office as the temporary mayor of the city. To create a pretext for dispatching forces toward Harbin, former Captain Masahiko Amakasu conducted covert operations, throwing bombs at multiple urban locations in Shenyang. Simultaneously, the 2nd Battalion cleared Pei Ta Ying after brief resistance and took Tung Ta Ying, while the 1st Battalion attacked Chinese forces near Changchun at Kuan Cheng Tze.^[25]

At General Honjō's request, General Senjūrō Hayashi, commander of the Chosen Army in Korea, ordered the 20th Infantry Division to divide its forces, forming the 39th Mixed Brigade, which set out for Manchuria on 19 September without authorization from the Emperor.^[25] The General Staff held the brigade at Sinuiju on the border, and it crossed into Manchuria on 21 September on Hayashi's own order.^[26][27] By the evening of 19 September, Japanese forces had captured Shenyang, Yingkou, Liaoyang, Fushun, Dandong, Siping, and Changchun. Chinese 2nd Army commander Wan Shu Cheng instructed the 44th and 643rd Regiments stationed at Daqing to withdraw toward Tianjin.^[25]

Japanese units captured Jilin City on 21 September, and took Jiaohe and Dunhua on 23 September.^[25] Between 20 and 25 September, additional towns including Hsiungyueh, Changtu, Tungliao, and Hsin-min fell under Japanese military control. The Northeastern Army numbered 160,000 soldiers at the start of the incident; about 60,000 went over to the Japanese, about 40,000 withdrew without offering much resistance in line with Chiang Kai-shek's policy, and the remaining loyal troops stayed in Heilongjiang province, mainly around Harbin under General Ding Chao.

In Tokyo, Prime Minister Reijirō Wakatsuki's cabinet was thrown into crisis by the military's independent actions. At a cabinet meeting on the morning of 19 September, War Minister Jirō Minami insisted the army had acted purely in self-defense, but the cabinet formally voted to enforce non-expansion of hostilities, sending orders to Honjō and Hayashi to halt forward movement.^[28] However, when Hayashi's Chosen Army crossed the border on 21 September, Minami and Chief of the Army General Staff General Hanzo Kanaya were terrified of charges of violating the imperial command prerogative.^[27] Kanaya sought an imperial audience to obtain retroactive approval, but senior army officers opposed an unrequested sanction, reducing the visit to an explanation and apology.^[27] At cabinet sessions on 22 and 23 September, Minami clashed with Foreign Minister Shidehara and Finance Minister Junnosuke Inoue over expenditures. Prime Minister Wakatsuki concluded that troops already across the border could not be sustained without operational funds, and authorized military expenditures, retroactively legalizing the deployment. Emperor Hirohito granted approval but sternly cautioned Kanaya to exercise prudence in the future.^[29]

On 24 September, the Japanese government issued its first statement on the incident, declaring that it would work to keep the incident from expanding, that the Kwantung Army had gone to Jilin to maintain order in the South Manchuria Railway zone and would withdraw to Changchun once that aim was achieved, and that Japan had no intention of acquiring territory in Manchuria. As reports of quick victories arrived, the civilian government felt powerless to oppose the army and decided to send three more infantry divisions from Japan at once, beginning with the 14th Mixed Brigade of the 7th Division.

Diplomatic Appeals and Collaborationist Secession Movements

On 19 September, Zhang Xueliang consulted with diplomat Wellington Koo (Gu Weijun), who advised petitioning the League of Nations while seeking an immediate direct meeting with General Honjō.^[30] That morning, Republic of China Vice Premier T. V. Soong (Song Ziwen) and Japanese Minister to China Mamoru Shigemitsu met and agreed on bilateral negotiations, a policy approved by Foreign Minister Shidehara; however, Chinese officials subsequently halted direct talks, concluding that negotiations with the civilian government were futile while the Kwantung Army continued advancing on its own initiative.^[31][32][33] On 21 September, Chinese League representative Alfred Sze (Shi Zhaoji) invoked Article 11 of the League of Nations Covenant, requesting an urgent council meeting.^[34] The Council was initially conciliatory toward Japan, avoiding sanction mechanisms under Article 15. On 30 September, the League passed a unanimous resolution requesting that China protect Japanese persons outside the railway zone and that Japan withdraw its troops back into the railway zone as quickly as conditions permitted, but set no enforcement deadline.^[35][36]

As Chinese provincial authorities abandoned Mukden, local administrative power was reorganized under collaborationist leadership. In Liaoning, a People's Preservation Committee declared independence from the Republic of China. On 26 September, Jilin Governor Zhang Zuoxiang was ousted, and the Provisional Provincial Government of Kirin was proclaimed with Xi Qia, commander of the New Kirin Army, as acting chairman, permitting Japanese forces to occupy Jilin City without bloodshed while retaining most bureaucratic personnel in their positions.^[25][37] In Harbin, General Zhang Jinghui established a local security administration aligned with Japanese authorities.

On 1 October 1931, General Zhang Haipeng, military commander at Taonan in northwestern Liaoning, declared his district independent of the central government in exchange for a large consignment of arms and military equipment supplied by the Kwantung Army.^[38][39] Ji Xing yielded the Yanbian Korean Autonomous Prefecture area, and on 17 October, Yu Zhishan surrendered eastern Liaoning.^[38] On 13 October, Zhang Haipeng ordered three regiments of his Hsingan Reclamation Army under General Xu Jinglong to advance northward to take Qiqihar, the capital of Heilongjiang province.^[40][41] While some city elements offered surrender, Xu's advance units encountered General Dou Lianfang's defensive force, suffering heavy casualties in fighting with a Chinese engineering company defending the north bank of the Nen River, where retreating forces dynamited the railway bridge.^[40][41]

Resistance Along the Nenjiang and the Fall of Qiqihar

Following the destruction of the Nenjiang railway bridge, the South Manchuria Railway Company expressed alarm that disrupted transit would halt the seasonal shipment of the region's valuable soybean harvest, urging military protection to facilitate repairs.^[42] The Kwantung Army issued an ultimatum demanding the bridge be rebuilt by 3 November or Japanese engineering teams would execute the repairs under military escort.^[42] Despite protests from the Japanese consulate, Japanese repair crews and escort troops deployed on 4 November, provoking an immediate armed confrontation with Chinese troops loyal to General Ma Zhanshan, the acting governor of Heilongjiang province.^[42][43] Defying orders from the Nanjing Nationalist government forbidding armed resistance, Ma deployed his troops to defend the river crossing.^[42][43]

During the first two days of combat, Chinese defenders repelled Japanese forces until Japanese reinforcements arrived on the field.^[42] While failing to permanently hold the crossing against superior firepower, General Ma's defiance at Nenjiang Bridge turned him into a celebrated national figure in China, and widespread coverage in Chinese and international newspapers stimulated volunteer enlistments across the country into newly forming Anti-Japanese Volunteer Armies.^[44] The repaired railway spans allowed Japanese armored trains and heavy formations to advance deeper into northern Manchuria. Reinforcements from Japan, including the 4th Mixed Brigade of the 8th Division, arrived during November.

On 15 November 1931, despite having suffered more than 400 dead and 300 wounded since early November, General Ma rejected a formal Japanese ultimatum demanding the surrender of Qiqihar.^[44] On 17 November, in freezing sub-zero weather, 3,500 Japanese troops commanded by Lieutenant General Jirō Tamon launched an assault against Chinese positions.^[44] Overcoming Chinese resistance, Japanese forces forced Ma's troops to withdraw toward Hailun, entering Qiqihar on 19 November 1931.^[45][46]

The occupation of Qiqihar violated explicit instructions from Tokyo. War Minister Minami had telegraphed Honjō on 19 November stating that the army could not occupy the provincial capital, and on 24 November, Chief of the General Staff Kanaya sent Telegraph No. 163 instructing the Kwantung Army to leave only a single infantry regiment in the vicinity and withdraw all other units within two weeks.^[46][47] Ishiwara resisted the order, urging Honjō to disregard it or resign. Honjō chose to obey the central command to avoid an open breach, leaving a minimal garrison in Qiqihar while withdrawing main elements south.^[48] In place of direct rule, the Kwantung Army installed a collaborative regime in Heilongjiang under Zhang Jinghui and initiated political negotiations to induce Ma Zhanshan to defect.^[49]

The Bombing of Jinzhou and Political Turmoil in Japan

In early October 1931, central army authorities ordered the Kwantung Army to refrain from intervening in regional civil government, intending to return to diplomatic negotiations. Alarmed that a diplomatic compromise would preserve the status quo, the Kwantung Army issued a public declaration on 4 October denouncing Zhang Xueliang's government in Jinzhou as an enemy of public order that had to be eliminated.^[50] On 8 October, Kanji Ishiwara organized an air strike against Jinzhou without securing authorization from General Honjō. The bombing wing consisted of six Type 88 reconnaissance aircraft and five French-built Potez 25 light bombers captured from Chinese hangars, escorted by a passenger plane carrying Ishiwara to observe the operation.^[51] The aircraft dropped 75 explosive bombs, weighing 25 kilograms each, attached to the fuselages with cotton cords because the reconnaissance planes lacked standard bomb racks and sights.^[51]

The air strike on Jinzhou, one of the earliest aerial bombardments of an urban population center, provoked strong condemnation across Europe and North America.^[52] Shi Zhaoji had the League of Nations Council convened.^[53] Over Japanese objections, the Council let the United States, which was not a party, take part as an observer. Chiang Kai-shek had his diplomats propose making Jinzhou a neutral zone, but withdrew the proposal on 4 December after strong opposition from Chinese public opinion.

Simultaneously, military extremists in Tokyo orchestrated the October incident (also known as the Imperial Flag Incident) in late October 1931. Led by Lieutenant Colonel Kingoro Hashimoto and the Sakurakai, conspirators planned to assassinate Prime Minister Wakatsuki, Foreign Minister Shidehara, and other cabinet members, and establish a military government headed by General Sadao Araki. Central military leaders uncovered the plot and arrested its ringleaders on 17 October, averting the coup.^[54] Although Ishiwara and the other Kwantung Army leaders opposed the coup, fearing that domestic turmoil would weaken the country and hamper the campaign in Manchuria, rumors of collaboration caused the General Staff to issue orders warning Honjō against declaring regional independence.^[54][55]

Internal divisions over the Manchurian crisis soon brought down the Japanese government. Home Minister Kenzo Adachi advocated an all-party national coalition cabinet with the opposition Seiyūkai party and boycotted cabinet sessions when Wakatsuki resisted.^[56] On 11 December 1931, the second Wakatsuki cabinet collapsed due to internal discord. Tsuyoshi Inukai, head of the Seiyūkai, formed a new cabinet on 12 December, appointing General Sadao Araki as War Minister. On the day it took office, the Inukai government, citing an increase in banditry, authorized Japanese forces to advance west of the Liao River; it also suspended the gold standard that month.^[57]

Conquest of Southern Manchuria

In late November 1931, General Honjō sent 10,000 soldiers in 13 armored trains, escorted by a squadron of bombers, toward Jinzhou, but the force was ordered to withdraw when it was 30 kilometers from the city; War Minister Minami cancelled the operation after the civilian government accepted a modified League of Nations proposal for a neutral buffer zone. After the Inukai cabinet assumed power and negotiations broke down, Tokyo dispatched substantial reinforcements. The remaining regiments of the 20th Infantry Division and the 38th Mixed Brigade of the 19th Division moved in from Korea, alongside the 8th Mixed Brigade of the 10th Division from Japan, bringing Kwantung Army strength to 60,450 soldiers.^[58]

On 21 December 1931, Japanese forces inaugurated extensive pacification and anti-bandit operations across Liaoning and Jilin provinces to suppress local resistance groups.^[59][60] In China, a new government was formed on 28 December after all members of the Nationalist government in Nanjing resigned. Chiang Kai-shek stepped down from his executive post, leaving Chinese military command in disarray. Sun Fo assumed leadership in the civilian government, while Northeastern forces received instructions to withdraw south of the Great Wall into Hebei province.^[59][61]

On 3 January 1932, Japanese troops marched into Jinzhou without encountering armed resistance as Chinese garrisons completed their withdrawal.^[57][59][62] The following day, Japanese units occupied Shanhaiguan, the eastern gateway of the Great Wall, establishing complete military control over southern Manchuria and severing overland connections between the Northeast and central China.^[63]

Fall of Harbin and Pacification of the North

With southern Manchuria secured, the Kwantung Army turned northward to eliminate remaining Chinese regular forces. Negotiations conducted by Colonel Kenji Doihara to convince General Ding Chao and General Ma Zhanshan to defect proved temporarily unsuccessful. In early January 1932, Doihara requested collaborationist General Xi Qia to march his New Kirin Army toward Harbin.^[59][63][64] General Ding Chao established a defensive perimeter around Harbin, repelling Xi Qia's advance columns in severe winter weather.^[64]

To break the stalemate, General Honjō dispatched the Japanese 2nd Division under Lieutenant General Jirō Tamon to assault Harbin directly. Tamon's troops coordinated with air and rail units, crushing Chinese regular defenses and capturing Harbin on 4 February 1932.^[64][65] General Ding offered an official cessation of hostilities on 27 February 1932, terminating regular Chinese army operations in Manchuria.^[64]

By the end of February 1932, General Ma Zhanshan had gone over to the Japanese side and joined the newly formed Manchukuo government as governor of Heilongjiang province and Minister of War.^[64] Although regular military resistance ceased, irregular resistance persisted. Displaced Chinese regular soldiers, local militias, peasant self-defense associations, and Red Spear societies formed Anti-Japanese Volunteer Armies, initiating an insurgency across the countryside that required Japanese and collaborationist forces to conduct years of pacification campaigns.^{[59][65][66][67]}

Establishment of the State of Manchukuo

In November 1931, Colonel Kenji Doihara engineered the secret evacuation of Puyi, the abdicated last emperor of the Qing dynasty, from his residence in the Japanese concession in Tianjin during civil unrest known as the First Tianjin Incident, transferring him to Lushun.^[68] The Kwantung Army convened a series of staff conferences to construct an administrative framework for a new state distinct from China. On 16 February 1932, regional collaborationist leaders from Jilin, Fengtian, Heilongjiang, and the Jehol special administrative area gathered to form the Northeast Administrative Committee under Zhang Jinghui.^[69]

On 18 February 1932, the committee proclaimed the formal separation and independence of Manchuria from the Republic of China. Puyi was offered the position of provisional head of state, which he accepted. On 1 March 1932, the State of Manchukuo was formally proclaimed with its capital at Changchun, renamed Hsinking (New Capital), and Puyi was inaugurated as Chief Executive (Zhengzhi) on 9 March.^[69] Following the conquest, Japanese authorities seized all major Chinese public enterprises, mining properties, and transport networks, many developed under the previous regimes of Zhang Zuolin and Zhang Xueliang, and transferred them to state-owned monopolies under Manchukuo and Japanese management.^[70][71]

The civilian cabinet of Prime Minister Inukai resisted immediate formal diplomatic recognition of Manchukuo, fearing complete diplomatic rupture with Western powers. On 12 March 1932, the cabinet adopted general guidelines seeking economic concessions while attempting to moderate relations with the League of Nations.^[72] On 15 May 1932, young radical naval officers and army cadets assassinated Prime Minister Inukai in the May 15 incident, effectively ending party-led constitutional government in prewar Japan.^[73] Admiral Makoto Saitō was appointed prime minister of a national-unity cabinet. In response to intense public pressure and unanimous resolutions passed by both houses of the Imperial Diet on 14 June, Foreign Minister Yasuya Uchida delivered his scorched-earth speech on 25 August, pledging that Japan would recognize Manchukuo even if the nation were reduced to ashes.^[74][75] Japan formally recognized Manchukuo on 15 September 1932 through the signing of the Japan-Manchukuo Protocol, which guaranteed Japanese military basing rights and stationing across the territory.^[76]

Domestic Impact in Japan

The conquest of Manchuria generated widespread public enthusiasm across Japan, where it was depicted as an economic lifeline capable of pulling the empire out of the Great Depression and resolving domestic shortages of raw materials, arable land, and employment.^[77][78][79] Historian Louise Young identified a pervasive war fever gripping Japanese society between September 1931 and the spring of 1933, creating broad popular support for military expansion that made any political proposal to abandon Manchuria unacceptable to the public.^[77][78][79]

While strict state censorship had not yet been fully instituted, mainstream media outlets rapidly abandoned moderate editorial stances. The liberal journal Kaizō stood out in November 1931 when reporter Gotō Shinobu accused the Kwantung Army of conducting a two-fold coup d'état against the governments in Tokyo and Nanjing.^[78][80][81] However, large commercial dailies such as the Asahi Shimbun discovered that anti-war editorials caused circulation to decline, leading them to adopt aggressive militarist platforms to expand sales.^[78][80][81] Prominent cultural figures echoed this shift; the poet Akiko Yosano, who had achieved national prominence in 1904 with her anti-war poem Brother, Do Not Give Your Life, published verse in 1932 praising bushidō, urging the army to discard compromise, and declaring death for the Emperor on the battlefield to be the purest act a Japanese man could achieve.^[78][80][81]

Opposition to the invasion remained marginal. The outlawed Japanese Communist Party denounced the campaign through its underground publication Shimbun Akahata and attempted an anti-war campaign, but attracted minimal public support.^[82][83] In 1933, exiled Communist leader Sanzo Nosaka (speaking under the pseudonym Okano) addressed audiences in Moscow, urging Japanese workers and soldiers to overthrow the imperial government.^[84][85] At the same time, right-wing terrorist violence destabilized domestic politics; between February and March 1932, the League of Blood (Ketsumeidan) assassinated former Finance Minister Junnosuke Inoue and Mitsui director Dan Takuma.^[86]

International Reaction and the Lytton Commission

Western news outlets covered the invasion with reports highlighting atrocities, the aerial bombardment of open cities, and operations against surviving soldiers, generating lasting international antipathy toward the Japanese Empire.^[3][87][88] On 7 January 1932, United States Secretary of State Henry L. Stimson issued the Stimson Doctrine, informing Japan and China that the United States would refuse to recognize any treaty, sovereignty change, or administrative arrangement that impaired the territorial integrity of China or violated the Kellogg-Briand Pact and the Nine-Power Treaty.^[1][89][90] Great Britain and France reacted cautiously, seeking to safeguard their commercial concessions in central and southern China and preserve cooperative ties with Japan against the Soviet Union.^[91][92]

In response to Chinese appeals, the League of Nations formed a commission of inquiry on 10 December 1931, headed by British diplomat Victor Bulwer-Lytton and including representatives from the United States, France, Germany, and Italy. The Lytton Commission traveled to Manchuria and Japan to conduct field investigations from February to July 1932.^[3][93] The commission presented its formal findings on 2 October 1932. The Lytton Report acknowledged that China had to a certain extent provoked Japan, and affirmed that Japan held legitimate economic investments in Manchuria; however, it explicitly concluded that the initial explosion at Mukden did not constitute legitimate self-defense and that the establishment of Manchukuo was not a genuine domestic independence movement, but the product of foreign military aggression.^[3][90][94]

The report recommended that Manchukuo remain unrecognized, that Manchuria remain under Chinese sovereignty, and that the territory be established as an autonomous special administrative region under international supervision, with Japanese economic interests protected by bilateral treaties.^[94] The Japanese government rejected these findings, insisting that Manchukuo had already received sovereign diplomatic recognition. On 24 February 1933, the League of Nations General Assembly adopted the Lytton Report.^[4] Japanese chief plenipotentiary Yōsuke Matsuoka led the Japanese delegation in walking out of the assembly hall.^[4] On 27 March 1933, Japan announced its official resignation from the League of Nations, which took effect two years later in March 1935, cementing Japan's international diplomatic isolation.^[1][4]

The Jehol Operation, the Tanggu Truce, and Aftermath

In early 1933, the Kwantung Army prepared to expand operations into Rehe (Jehol) province, located southwest of Manchuria, arguing that Chinese forces along the Great Wall posed a defensive hazard to Manchukuo.^[95][96] On 23 February 1933, with authorization from Tokyo, the Kwantung Army launched the Battle of Rehe (Operation Nekka). The Japanese 6th Division advanced on 25 February, capturing Chaoyang that day and taking Chengde, the provincial capital, on 4 March.^[95][97][98] Japanese forward units reached the Great Wall passes by 10 March, penetrating into Hebei province.

The Tanggu Truce was signed on 31 May 1933, ending the Jehol operation. The truce created a demilitarized zone extending up to 100 kilometers south of the Great Wall, from Beijing to Tianjin. In the narrow definition, the Jehol operation and the truce that ended it are regarded as the end of the Manchurian Incident as a whole, as they made the Nationalist government accept Japanese control of Manchuria in practice.

Historians view the Manchurian Crisis as an early turning point leading toward the Second World War. The League of Nations' inability to halt Japanese aggression revealed the practical impotence of international collective security arrangements. Dictators Adolf Hitler in Germany and Benito Mussolini in Italy took note of the League's lack of enforcement capability, drawing lessons that encouraged the Italian invasion of Abyssinia in 1935 and subsequent German territorial expansion into Austria, Czechoslovakia, and Poland between 1938 and 1939.^{[99][100][101][102]} Soviet troops and guards of the Chinese Eastern Railway remained in Manchuria, and in March 1935 the Soviet Union sold its rights in the railway to Manchukuo for a large sum. Japanese military rule in Manchuria persisted until the Soviet invasion of Manchuria in mid-August 1945, when Soviet and Mongolian forces dissolved Manchukuo, leading to the restoration of Manchuria to Chinese administration.^{[1][103][104]}

References

1. "Milestones: 1921–1936 – Office of the Historian". history.state.gov. Retrieved 2023-03-02.
2. 岡崎・佐藤 2000, pp. 160–163
3. Harries & Harries 1991, pp. 161–163. (Harries, Meirion; Harries, Susie (1991). Soldiers of the sun : the rise and fall of the Imperial Japanese Army. New York: Random House. ISBN 0394569350.)
4. 緒方, p. 321. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
5. 江口圭一 1998, pp. 9–13. (江口圭一『日本帝国主義史研究』青木書店、1998年2月。doi:10.11501/14077975。ISBN 4-250-97051-5。)
6. Yoshihashi 1963, pp. vii–viii. (Yoshihashi, Takehiko (1963). Conspiracy at Mukden: the rise of the Japanese military. New Haven: Yale University Press.)
7. Yoshihashi 1963 ↓, s. VII–VIII. (Takehiko Yoshihashi: Conspiracy at Mukden: the rise of the Japanese military. New Haven: Yale University Press, 1963. (ang.).)
8. 緒方, pp. 14–16. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
9. 緒方, pp. 19–21. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
10. 緒方, pp. 23–26. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
11. 緒方, pp. 19–20. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
12. 緒方, pp. 27–28. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
13. 緒方, pp. 27–31. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
14. 緒方, pp. 34–35. (緒方貞子『満州事変――政策の形成過程』東京都千代田区: 岩波書店〈岩波現代文庫〉、2011年8月18日。ISBN 978-4-00-600252-7。)
15. 『川田稔『満州事変と政党政治』』講談社〈講談社選書メチエ〉、2010年9月、11-13頁。ISBN 978-4-06-258480-7。
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23. CHRONOLOGY OF MAJOR INTERNATIONAL EVENTS FROM 1931 THROUGH 1943, WITH OSTENSIBLE REASONS ADVANCED FOR THE OCCURRENCE THEREOF 78th Congress, 2d Session. "An explosion undoubtedly occurred on or near the railroad between 10 and 10:30 p.m. on September 18th, but the damage, if any, to the railroad did not in fact prevent the punctual arrival of the south-bound train from Changchun, and was not in itself sufficient to justify military action. The military operations of the Japanese troops during this night, ... cannot be regarded as measures of legitimate self-defence..." [Opinion of Commission of Enquiry], ibid., p. 71
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