"Know Thine Enemy", sound advice that one should always follow.
A number of years ago I wrote a series of articles on the Imperial Japanese Navy, which I posted here on the UB SH Forums. When Ubi made the switchover to the new forum format, most of those articles were lost. Luckily, I saved them all long time ago intending to publish them in a pdf file at some point in time. I finally got around to finishing that project earlier this evening. If it helps you gain a greater understanding of what goes on in SH4, then I consider my time and effort that I put into this worthwhile. I hope you enjoy the information I've presented and I would like some comments on how you liked it if you have time to do so.
Imperial Japanese Navy