Mezue ahịrịokwu na-esonụ: N'abalị iri na ise nke ọnwa Ọgọstụ n'afọ 1914, mgbe Agha Ụwa nke Mbụ tiwapụrụ na Yurop, Japan nyere Germany akwụkwọ ikpeazụ na-arịọ ya ka ọ hapụ ịchịkwa ókèala Kiaoutschou a na-ese okwu. Mgbe a jụrụ ultimatum ahụ, Japan kwupụtara agha na 23 Ọgọstụ na n'otu ụbọchị ahụ ndị agha mmiri ya wakporo ókèala German. N'abalị asaa n'ọnwa Nọvemba n'afọ 1914, ndị agha Japan weghaara ụsọ mmiri ahụ (lee
Nchịkọta nke Tsingtao). Mgbe mkpebi nke nsogbu Shandong gasịrị, ala a na-achịkwa laghachiri China na 10 Disemba 1922 mana ndị Japan weghaara mpaghara ahụ ọzọ site na 1937 ruo 1945 n'oge Agha nke Abụọ nke China na Japan.