Japanese World War II officer Shigeta Kage's written confession, published on Monday, reveals the murder of at least 13 Chinese.

According to the original document, available on the State Archives Administration (SAA) website, the Japanese garrison army killed at least five anti-Japanese armed guerrilla soldiers and staff in Liuhe County in May 1937.

Kage admitted to killing one of them with a Japanese sword himself, according to the document.

The criminal recalled that the Japanese army forced some 6,500 households in Liuhe to move out of their houses to create depopulated zones starting July 1936. During that period, Kage killed 8 Chinese while accusing them of "entering the depopulated zone."

Kage served as chief instructor of Liuhe County Police Administration of Mukden Province of the "Manchukuo" puppet state and chief of the Police Division of the Police Bureau in Jinzhou City.

This is the latest of 45 Japanese war criminal confessions the SAA plans to publish. The SAA has been issuing one a day since July 3.

The move follows denials of war crimes by Japanese Prime Minister Shinzo Abe and right-wing politicians.