I hate asking for help, but here I go, lol. I know absolutely nothing about Japanese militaria, and a friend asked for some help, which I'm unable to do. His uncle, who is still alive actually, has recently given him several items which included a Japanese flag and sword. Here is the flag. It is not one of the norm, I think, and I've personally have never seen on. He and myself would be very grateful for any help. Images to follow...
Second World War Japanese FlagSecond World War Japanese FlagSecond World War Japanese FlagSecond World War Japanese Flag