Jinan incident

The Jinan incident (Wade-Giles: Tsinan Incident, 済南事件) or May 3 Tragedy, was an armed conflict between the Japanese Army allied with Northern Chinese warlords against the Kuomintang's southern army in Jinan, the capital of Shandong in 1928 during the Kuomintang's Northern Expedition.

Background
During the Northern Expedition, troops of the Chinese National Revolutionary Army attacked several foreign consulates in a fervor of anti-imperialism in what became known as the Nanjing Incident of March 1927. Chiang Kai-shek sought to avoid repetition of such incidents, and in November 1927 he met with Tanaka Giichi, who had become Japan's premier in April of that year (and also held the portfolio of Foreign Minister) in part, on the strength of promises to take more active and aggressive measures than his predecessor toward protection of Japanese lives, property, and economic interests in China. Chiang had only a tenuous hold on power in China and relied in large measure on the promise to end foreign domination and re-unify the country to buttress his legitimacy.

Tanaka realized that the use of force was not necessarily the best way to protect Japanese interests, and Chiang both wanted to keep his troops away from Jinan and the risks of a costly but useless clash. With no guarantee that Chinese National Revolutionary Army would bypass Jinan, prior political commitments and Imperial Japanese Army insistence forced Tanaka to reinforce Japanese forces in the Shandong leased territory. Between May and September 1927, some 4000 troops were deployed to Qingdao and Jinan in what was known in Japan as the First Shandong Expedition (第一山東出兵). Both the northern warlord coalition government in Beijing (Peking) and the Kuomintang government in Nanjing (Nanking) protested vigorously that this was a violation of China's sovereignty, and the Japanese forces were withdrawn when Chiang temporarily halted his northern advance.

Hostilities
When the Northern Expedition resumed on April 27, 1928, contrary to his standing orders from Tokyo, Japanese commander Gen. Fukuda Hikosuke moved troops from Tianjin into Ji'nan and Qingtao along the Jiaoji Railway. This was known in Japanese as the Second Shandong Expedition (第二山東出兵). Northern Chinese troops under Zhang Zongchang withdrew from the city on April 30, 1928, and Kuomintang troops, also acting contrary to Chiang Kai-shek’s orders, moved in. Matters remained tense as the Japanese took up positions at the Japanese consulate and various Japanese-controlled businesses and schools, but reasonably quiet and amicable until a minor clash occurred near the home of a Japanese family on May 3, 1928, resulting in the deaths of 12 Japanese. The British Acting Consul-General reported that he had seen the bodies of Japanese males who had been castrated. Japanese reports blamed the shooting on troops under Gen. He Yaozu (賀耀祖), reputed to have been responsible for the Nanjing Incident, while Chinese reports held that Chinese soldiers had been attacked by Japanese. Leaders on both sides agreed on a truce and a cease-fire, and the Japanese consul general in the city pushed for peace. Gen. Fukuda and his fellow generals, however, perhaps motivated by the desire for action, felt that they could not let the "insult" to Japanese honor go unpunished, but did not take action until they had built up stocks of food and ammunition.

Chiang Kai-shek judged it more important for his troops to move on to Peking than to fight in Ji'nan and sent a team of officers to negotiate. On May 7, Gen. Fukuda issued a five-point set of demands so onerous that the Chinese would have no choice but to refuse, with a 12-hour deadline. He refused to release the negotiators, including Cai Gongshi (蔡公時) and 16 others in his team. When commissioner Cai protested in Japanese, Japanese officers placed an order to slice off his nose and ears, and to gouge out his eyes and tongue. Sixteen other members of his negotiation team were also stripped naked, recklessly whipped, dragged to the back lawn and slaughtered by machine guns on the same day. Having received reinforcements and supplies, the Japanese by 11 May, after fierce fighting, pushed Chinese troops from the area and inflicted thousands of casualties and killed over 2000 Chinese civilians.

Publicly, Chiang apologized to the Japanese and removed the Chinese commander; in his diary he expressed his new feeling that Japan was China's greatest enemy. But "before one can settle scores," he wrote, "one must be strong."

Aftermath
If the incident had been an isolated example of Japanese assertion and Chinese resistance, a general understanding might have been reached. However, Chiang's troops expanded their control in North China and the Japanese Army continued to distrust the forces of Chinese nationalism. Japanese Army leaders feared that Chiang would respond to patriotic agitation and threaten their interests in South Manchuria. On June 4, as he rode in a special train, Zhang Zuolin, the military leader of Manchuria who had been talking about joining forces with Chiang, was blown up by officers of the Japanese Army, setting off a chain of events leading to the seizure of Manchuria and the establishment of Manchukuo. When Chiang lectured a group of Chinese army cadets, he urged them to turn their energies to washing away the shame of Jinan, but to conceal their hatred until the last moment. The Kuomintang government later decreed that May 3 be designated a "National Humiliation Memorial Day."

Misuse of photograph
In a television program produced by Asahi TV station on November 21, 1992 (War And Non-humanitarian Activities), former IJA medicals pointed out the photos shown as "Human Experiment of 731 Unit" in Jilin Province Museum are actually autopsy photos of Japanese victims in Jinan Incident.