The Communist Party is an anti-Japanese base area and the Kuomintang is a Kuomintang-controlled area. What area is Japan?

The Communist Party is the anti-Japanese base area, the Kuomintang is the Kuomintang-controlled area, and Japan is the occupied area and the puppet Manchukuo state. The country is divided into three regions, namely the Kuomintang-controlled areas (referred to as the Kuomintang-controlled areas), the liberated areas led by the Communist Party (also known as the anti-Japanese base areas behind enemy lines), the occupied areas occupied by Japanese imperialism and the puppet Manchukuo.