In 1936, when he was a naval mechanic 2nd class and a crewman on the light aircraft carrier Ryūjō, he studied hard and passed the difficult IJNAS exam, taken by thousands of applicants.
During his time as a naval mechanic 2nd class on the light aircraft carrier Ryūjō in 1936, he dedicated himself to studying and achieved success by passing the demanding IJNAS exam, which many others also attempted.