He is a cheerful old farmer who jokes as he serves rice cakes made by his wife, and then he switches easily to explaining what it is like to cut open a 30-year-old man who is tied naked to a bed and dissect him alive, without anesthetic.
"The fellow knew that it was over for him, and so he didn't struggle when they led him into the room and tied him down," recalled the 72-year-old farmer, then a medical assistant in a Japanese Army unit in China in World War II. "But when I picked up the scalpel, that's when he began screaming.
"I cut him open from the chest to the stomach, and he screamed terribly, and his face was all twisted in agony. He made this unimaginable sound, he was screaming so horribly. But then finally he stopped. This was all in a day's work for the surgeons, but it really left an impression on me because it was my first time."