N'oge Agha Ụwa Mbụ, "Saga" so ndị agha Japan buru ibu gaa n'ógbè Shandong, China n'oge nnọchibido nke Tsingtao
(25 Septemba-16 Nọvemba 1914) megide ndị agha nke Imperial Germany dị ka akụkụ nke onyinye ndị Japan nye ndị Allied n'okpuru Anglo-Japanese Alliance. Mgbe nke ahụ gasịrị, a kpọfere ya na ndị Japan nke Abụọ Fleet ma kenye ya ọrụ na South China Sea.