Possible Clues:

• Samurai's unarmed self-defence martial art
• Literally, 'art of softness'
• Art developed by ancient samurai
• Japanese defense system
• By the sound of it, d'you wrestle with the dough in Japan?
• It's featured in W African fetish for unarmed combat
• Japanese method of unarmed self-defence
• Samurai self-defence
• Eastern method of self-defence without weapons
• Fighting system? It is, briefly, in the charm