Play as Hisui:
Beat the game on Easy.
Play as Hotsuma:
Start the game with a memory card containing a saved completed game from Shinobi,
and then beat the game on Normal.
Play as Joe Musashi:
Beat 88 missions and get all the Secret Clan Coins.
Alternate Hisui costume:
Get all 88 Secret Clan Coins.
Alternate Hibana costumes:
Beat the game on Normal or
Thanks to Revolution readers Johnson and andre3000!