Enter the following cheats after pausing gameplay.

• Boost Score: Hold WHITE + BLACK and enter RIGHT, RIGHT, RIGHT, LEFT
• Boost Offense: Hold R + WHITE and enter UP, DOWN, UP, DOWN
• Display Score: RIGHT, RIGHT, RIGHT, LEFT
• Full Kuji meter: Hold R + L and enter LEFT, LEFT, LEFT, RIGHT, X
• Get one Kanji: LEFT, LEFT, LEFT, RIGHT, X
• Restore Health: UP, DOWN, UP, DOWN, X, X, X
• New Special Ability: Hold R + BLACK and enter UP, UP, DOWN, DOWN, release R + B and enter X, X, L

Enter the following cheats at the Ninja Item Select screen.

• All Ninja Items: Hold R + L and enter UP, DOWN, UP, DOWN, X, X, X, LEFT, RIGHT, LEFT, RIGHT, X, X, X
• Infinite Capacity: Hold R + L + WHITE and enter UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, release WHITE and enter X, X, X
• More Ninja Items: Hold R + L and enter UP, LEFT, DOWN, RIGHT, X, X, X

Enter the following cheats at the Mission Select screen.

• Open all Layouts: Click Right Analog, Click Left Analog, L, R, WHITE, BLACK
• Unlock all Missions: WHITE, WHITE, L, R, RIGHT, X, Click Left Analog, Click Right Analog

Enter the following cheats at the title screen.

• Unlock All Characters: Hold WHITE + BLACK and enter UP, RIGHT, LEFT, DOWN, release WHITE + BLACK and enter L, R
• Unlock B-Side Audio: Hold L + R and enter DOWN, X, X, UP, X, X, LEFT, X, X, RIGHT, X, X
• Unlock "Through the Portal" bonus Rikimaru mission: WHITE, UP, BLACK, DOWN, L, R, LEFT

Earn a Grand Master rank with Ayame on all missions.

Earn an Expert Ninja rank with Rikimaru and Ayame on all missions, and earn a Professional rank with Tesshu on all missions.

To pass through ceilings, cling to the ceiling, equip the grappling hook, and then press Y. You should pass to the next floor of any multi-tiered building.