Captain Orita was one of the most active Japanese submarine commanders to have survived WWII. He details his experiences in hunting U.S. and British ships throughout the Pacific Ocean. He discusses how other Japanese submariners sank the Yorktown carrier and the Indianaplis cruiser. He details the different classifications of Hirohito's submarines. He notes how and which various Japanese submarines were sunk on their missions. He describes how his submarines attacked Sydney Harbor and shelled Santa Barbara, CA.
He discusses how Japanese submarines conducted resupply missions throughout New Guinea and Guadalcanal, and the difficulties that they experienced. He is able to put a very human face on the stoic pilots of the Kaiten "one way" suicide submarines, and how their one and two-man crews trained, and sometimes failed in horrible drowning accidents. He seems to be a little vexed in that he believes that the Japanese submarines sank a lot more Allied ships that what the Allied navies are willing to admit. Not an "exciting" battlefield suspenseful reading book, but a nice, well written view from a true seafarer who survived the worst that Davy Jones' sea locker had to offer.