The answer is <u>Triple Entente.</u>
Most Japanese on border states especially in Washington Oregon and California for put into interment camps for the majority of the war after they were seen as threats saying that any one of them could be spies sent over from japan they also lost their businesses, jobs, and in some occasions frees speech
Here are some reasons take your pick. Good luck! :)
Japan had modernized weapons
Corruption of the Chinese government-officials embezzled military funds.
Chinese army and navy had little preparation for the war
Japan had better war tactics and strategies
Chinese just finished the War of Opium and were weak
The majority of China’s massive population was not educated
