據(jù)堀口正雄1954年8月筆供，他1901年出生，日本東京都人。1937年起到中國東北參加侵華戰(zhàn)爭，曾先后任日本新京憲兵隊敦化憲兵分隊隊長，錦州憲兵隊中佐隊長等職。

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重要罪行有：

1937年8月，將1名被俘抗日聯(lián)軍愛國分子“押到敦化縣城西側炮臺山高地，命令部下憲兵軍曹用日本刀進行砍頭慘酷行為?！?/p>

1938年末－1939年8月，將逮捕的愛國者8名進行拷問審訊后，其中“3名以特殊輸送（特委處分）哈爾濱第731部隊”。

1939年6月，手下憲兵隊的刑訊拷打致1名中國人死亡，“命令利用夜間把尸體送到山中埋上了”。

1939年8月，部下在抓捕中槍擊致1名中國人死亡，命令“利用黑夜把尸體投棄于牡丹江河中”。

1942年8月－1943年8月，共逮捕抗日人員約80名，其中“經憲兵司令官的批準指令送哈爾濱第731部隊約20名”。

According to the written confession of Masao Horiguchi in August 1954, he was born in Tokyo, Japan in 1901. He went to northeast China to join the War of Aggression against China in 1937 and served successively as unit commander of Dunhua Branch of the Japanese Xinjing Military Police and colonel and commander of Jinzhou Military Police.

Major offences:

August 1937: had a captured anti-Japanese patriot of the Anti-Japanese United Army "escorted to the highland on Paotaishanto the west of Dunhua County, and then ordered the subordinate sergeant of military police to cruelly behead that person with Japanese sword";

From the end of 1938 to August 1939: after interrogating with torture the 8 captured Chinese patriots, "sent 3 of them in special transfer (special punishment) to Unit 731 in Harbin";

June 1939: after a Chinese was tortured to death while being interrogated by the subordinate military police, "ordered them to bury the body in the mountains at night";

August 1939:the subordinates shot a Chinese to death during an arrest, ordered them "to throw the body into Mudanjiang River at night";

From August 1942 to August 1943: arrested a total of 80 anti-Japanese people, "with the permission and instruction of the commander of the military police, 20 of them were sent to Unit 731 in Harbin".