According to the written confession of Yoshio Mizoguchi in August 1954 and June 1956, he was born in Nagasaki Prefecture, Japan in 1910. In October 1933, he went to northeast China to take part in the War of Aggression against China. He was procurator of Harbin Local Procuratorate of the "Manchukuo".
From March to June 1943:"I sentenced 9 Chinese patriots to death penalty in Bayan. With another 4 dead in prison during the interrogation, I killed a total of 13 people";
May 1945:"I prosecuted 26 Chinese patriots" arrested for their assaulting the "Manchukuo" Police Department and "requested death penalty for 9 of them". The 9 people were executed on 10 July;
June 1945: "I prosecuted 30 Chinese patriots" who had been arrested "and requested death penalty for 3 of them." "From 10 to 13 August, the 3 Chinese patriots were executed in Daoli Prison of Harbin";
June 1945:prosecuted 35 captured people, including soldiers and officers of the 3rd Route Army of the Northeast Anti-Japanese United Army and anti-Japanese patriots, "requesting death penalty for 15 people, including Captain Sun Guodong, and over 15 years of imprisonment each for the other 20 people". "From 10 to 13 August of the same year, the 15 Chinese, including Captain Sun Guodong, were executed in Daoli Prison of Harbin."