China's State Archives Administration posted the confession of Keiji Saganaka on Sunday in its latest move to expose Japan's war crimes on the international stage.
In his written confession, Keiji admitted killing 831 Chinese while he was in command from April 1937 to September 1945.
The victims included 434 civilians, 98 militiamen, 252 soldiers of the Eighth Route Army, 38 anti-Japanese soldiers of other armies and nine prisoners of war.
His methods of killing were especially brutal, shooting, stabbing, beheading, burning, and starving.
He confessed to killing a soldier by dissecting him while he was still alive and burying 30 civilians waist-high before shooting them.
Keiji was also responsible for the enslavement of thousands of Chinese civilians who were captured and used for forced labor.
He also admitted to raping more than 30 Chinese women and using poison gas on the battlefield.
This is only the beginning of China's publication of confessions of 45 Japanese war criminals.
China wants to highlight Japan's wartime atrocities amid disputes with the country over history and territory.
The document has also been translated into English, reflecting China's efforts to reach Western audiences.
Sohn Jung-in, Arirang News.