I absolutely love Akai Katana. The demo defaults to Shin mode, but I think it also has Zetsu and Arcade on it (not sure though). Have you tried them? Zetsu is superior IMO; it's basically the finished version of the game without the limitations of the aging PCB hardware.
Speaking of Akai Katana, today I decided to give Arcade mode a real shot. Result: 248,106,230 ALL with Type 3. I found it a lot easier than Zetsu, and the constant A, C, A, C, A, C, A, C, etc. to refill the ninja meter quickly gets pretty annoying. It's still fun though, but I don't see any reason to play Arcade mode when Zetsu exists.