The war Japanese started began with Korea and ended with America, it just flowed into WW2.
Incorrect. As was previously stated, Korea already belonged to Japan. The war started when Japanese forces invaded Manchuria from Korea in Sept. 1931.
Actually you are incorrect. Japan had a 35-year imperialist expansion, which lasted August 22, 1910 to August 15, 1945. That expansion included Korea, China, and finally US islands. Which ended up (you guessed wrong) happening to include WW2.
nit-picking the nit-picker: japanese expansion started in 1905 with attacking the russian forces in Port Arthur ^^