From Japanese Destroyer Captain, by Tameichi Hara (Naval Institute Press, 2013), Kindle Loc. 321-346:
Eta Jima is a small island facing the spacious harbor of the naval port of Kure, near Hiroshima, in the Inland Sea. Our course of studies at the Academy lasted four years. Except for summer vacations and a few short days of home leave, we lived on this island in complete isolation from the outer world.
Three days after my enrollment, as I was about to enter my dormitory, a third-year man shouted harshly at me, “Halt!” When I did, he hurried over and demanded angrily, “Why did you fail to salute me?”
I did not know what to answer, as I had not even seen him until after his command.
“Attention!” he roared. “Stand with your feet apart and be prepared. I’m going to knock out some of your laxity.”
He hit me in the face with his fist a dozen times. If I had been standing at attention, his first blow would have knocked me to the ground. This treatment came as a great shock to me. I trudged into my billet bruised and bleeding.
The next day at breakfast a senior discovered that my uniform was improperly buttoned, and I received another dozen blows on my swollen face. My second assailant was stronger than the first. My left ear kept ringing all the rest of the day.
When a plebe was singled out for discipline, all other students in his platoon were lined up and given one blow. All plebes were subjected to this unique system of discipline, from which there was no respite. Each Sunday the 180 freshmen were assembled on the parade ground and made to stand at attention for four or five hours under the broiling sun. Instructors and their upper classmen “assistants” kept watching and ordering us. The hours of this Sunday lesson were punctuated by almost continuous fist beatings.
After a few months of such treatment the newcomers became sheeplike in their obedience. Every man’s face bore evidence of the brutality we endured. My ear trouble became chronic, and I suffer from it to this day.
For some of the boys the rigors of this discipline did not seem to be too much of a shock. They had perhaps grown up in a similar environment. In some Japanese homes a stern father chastised his children liberally. In many provincial schools the boys were treated tyrannically by their teachers.
For me it was different. I was the proud son of a samurai family. No member of my family had ever tried to hit me. In my schooling harsh methods of discipline were never employed.
Perhaps I was spoiled to some extent. Perhaps I was not ready for a military career. At any rate, the Eta Jima discipline outraged and embittered me. Even today I remember those early days in the Academy with a bad taste in my mouth.
Certain of my seniors were sadistic brutes. They took singular delight in terrorizing freshmen. To this day I feel a revulsion at seeing these men, even though we have since shared the labors and miseries of war, and the same luck in surviving it.