Imperial Japan is one of the largest maritime empires in history. Since 1920, the Japanese Empire has slowly expanded over the Far East, culminating in the invasion of Manchuria in 1931. With the collapse of the United States and the surrounding chaos, there was no organised international opposition to the Japanese conquest, and the Empire has been expanding ever since.
Imperial Japan has cordial relations with the Kingdom of Hawaii and Pacifica, as well as a peace treaty with both Germany and the USSR. Notably, they have made no attempt to sign a similar treaty with the British Empire.