Convicted by an Australian military tribunal in 1946 of torturing prisoners of war, Takenaga was sentenced to five years in prison as a BC-class war criminal. He served out his sentence on the islands of Morotai, New Britain, and Manus.
一九四六年，竹永茂松接受澳軍軍事審判，被控虐待戰俘，以 BC 級戰犯判五年徒刑，先後在摩羅泰島、拉包爾及馬努斯島服刑。