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.
In 1936, while working as a naval mechanic 2nd class on the light aircraft carrier Ryūjō, he successfully completed the demanding IJNAS exam, demonstrating his dedication to learning and passing a challenging test.