Unlockables

Unlockable                  How to Unlock
Issen mode                  Beat the game on Hard mode.
Hard mode                  Beat the game on normal mode.
Panda costume                  Complete the secret training mode.
Jacuqe''s alternate costume   Beat the game on normal mode.
Michelle''s second alternate costume    
                             Beat the game with Onimusha rank.
Michelle''s alternate costume Beat the game on normal mode.
Oni Hard mode                  Beat the game on Issen mode.
Ultimate mode                  Clear the Oni shooting mini-game.
Original Onimusha swords (new game)
                             Clear the game with all three items
                             from the Phantom Realms.
Bishamon sword                  Beat the game with Onimusha rank.
Oni Musou                  Have Jacque go through the Phantom Realm
                             in Honnouji.
Adventures of Heihachi mode  Beat the game once.
Genma Puzzle mini-game          Solve all puzzles in the game.
Oni Shooting mini-game          Beat the game on normal mode.
Secret training mode          Beat the game with the normal training mode cleared.
Ako''s Black Haori          Clear the Issen training.

Awards

Unlockable                  How to Unlock
Bravery                  Beat the game without saving.
Critical                  Defeat more than 40% enemies by using critical.
Defense                  Get damage lesser than 5120.
Explorer                  Find all 23 Tengu chests.
Offense                  Kill more than 3000 enemies.
Speed                          Have a completion time of less than 5:00:00.