Unlock More options-
By obtaining 20 oboro coins you can unlock new features in the options menu such as the Art gallery and the Movies.
Unlock More characters-
there is two characters inside shinobi:
Moritsune-get 30 Oboro coins.
Musashi-get 40 Oboro coins.
Unlock More stages-
If you collect all the coins in the game you will unlock nine VR-style that will enhance your skills. To acces them scroll past level 8-b on the stage selection screen.
how to unlock hard mode-
Complete the game on normal mode to unlock the hard difficulty setting on the Main Menu. This mode has more coins and much more challenging enémy encounters.
how to unlock super mode-
Complete the game on hard mode to unlock the super difficulty setting at the main menu.