According to the written confession of Shoji Nishinaga (alias Ryosuke Nakamura) in July 1954, he was born in Yamaguchi Prefecture, Japan in 1899. During the Japanese War of Aggression against China, he served successively as chief of the Japanese Yanjijian Island Dispatch Military Police and unit commander of the Kaifeng Japanese Military Police.
From August 1933 to March 1934: led the subordinate military police to kill 20 Communist guerrillas and anti-Japanese people "on the riverside under the Yanji Bridge in Yanji River region";
From autumn 1934 to early summer 1935: led the subordinate military police to kill 16 Communist guerrillas and anti-Japanese people "in Yanji River region along the north side of Tumen City";
Early summer 1939: instructed the subordinate military police to "give severe punishment (killing) to the 6 arrested Communist guerrillas and Kuomintang intelligence operators by sending them with trucks to a field near the streets of Tongzhou, Beijing";
From August 1939 to November 1940: while serving as unit commander of the Kaifeng Military Police, ordered the subordinate military police to kill 12 anti-Japanese Chinese patriots.