The Pacific War was the preferred term, in Japan, for World War Two in the Pacific, but logically encompass the wars and political changes of the modern Empire of Japan (1868-1945), leading to WWII. These include:
Incidents short of full-scale war, as well as economic exploitation, fall under the general scope of the subject. These are principally in East Asia, including China, Manchuria, Mongolia and Korea. To some extent, it includes parts of Southeast Asia, especially French Indochina.
The political dynamics of Japanese militarism, which led to the decisions to go to war, also are part of this topic.