Face the consequences of choosing the Dragon's Fang.
Only nine-hundred and nintey-nine left....
Defeat a tengu at its own game.
Execute a boss.
Pet a cat in Uncle Jiro's Dojo.
Die to a custodian.
Cut the Blacksmith's Arm out of the air.
Defeat an Optional Boss.
That's probably the only time.
Earn the rewards of choosing the Bokken.