Senshi Sōsho
The Senshi Sōsho (戦史叢書, War History Series), also called the Kōkan Senshi (公刊戦史), is the official military history of Imperial Japan's involvement in the Pacific War from 1937 to 1945. The task of compiling the official account of the Japanese involvement in World War II began in October 1955 with the opening of the War History Office (the present Military History Department of the “National Institute for Defense Studies”, or NIDS, of Japan's Ministry of Defense in Tokyo, Japan).