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| 1928, April |
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| Japan intervened again in Shandong, allegedly to protect Japanese nationals there, leading to the following events in early May. | 1 |
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| May 3–11 |
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| Sino-Japanese clashes erupted in Jinan: Japan temporarily seized control of the railways in Shandong; a Chinese boycott movement against Japan lasted for over a year; the incident was settled on March 28, 1929; China agreed to pay damages but not an indemnity; and Japanese troops withdrew on May 20, 1929. | 2 |
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| June |
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| Zhang Zuolin was assassinated by a clique of officers within the Guandong army, in order to make his forces in Manchuria and north China more cooperative. This policy backfired; Tanaka was compelled to recognize the Nanjing-based regime (Guomindang) of Jiang Jieshi (Chiang Kai-shek); and the Tanaka cabinet ultimately fell (July 2, 1929) when the emperor intervened to note Tanaka's failure to prosecute the murderers of Zhang. | 3 |
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