About Sensuikan: Japanese Fleet Submarines in WW2, from BoardGameGeek:
Sensuikan: Japanese Fleet Submarines, 1941-45 is a solitaire, tactical level game that places you in command of a Japanese Fleet submarine from Pearl Harbor until the end of the war in 1945. After choosing a class, your mission is to conduct special missions as assigned by the Combined Fleet. The player will take his submarine on assigned missions with the objective to complete said missions, as opposed to necessarily sinking merchant vessels (although that is sometimes an objective). You will be advancing your crew quality and increasing your commander's rank and awards-all while remembering you have to make it home amidst diminishing odds of survival as the war progresses.
The system is packed with rich technical detail based on the various submarine classes used by Japan. There are no less than 17 classes of submarine to choose from. Besides the focus on hardware, the human aspect of the war is captured as the submarine Commander (the player) and his crew can improve over time via skills acquisition. In addition to having combat modules to facilitate ease of play, the game includes a major change by including the "Major Event" markers that track the war's progress and possibly involve the player in supporting the Major Events as they occur. Players will find it extremely challenging to survive an entire tour from 1941 to 1945, at which time, if still alive, you will surrender at port, having done your part on the front lines.
Gameplay moves quickly, following a set sequence of events that are repeated until the end of the game. Once you have your initial assignment, your submarine goes on patrol, randomly rolling for events and encounters. Special emphasis is placed on successfully conducting any operations assigned to you by Higher Command, as implemented by the "Major Event" marker system. Although sinking enemy shipping is always encouraged, the game's primary goal is to conduct operations as assigned to support the Main Force Fleet or other ongoing significant military operations.
This game should be highly accessible to those familiar with the The Hunters or Silent Victory game systems.
-description from the publisher
