Did Japan have Kiai Jutsu before 20th century? What happened to it today? I was just googling, and I found some articles on Kiai Jutsu in Japan. FightingArts.com - Kiai Jutsu: The Shout Used As A Weapon Kiai-Jutsu | Shuyokan Ryu Martial Arts Center I assumed that Kihapsul/Kiaijutsu (Kiai/Kihap Techniques) was solely Korean origin because Japan doesn't have it today. But did Japan have this sport in the medieval time? If so, what happened to it today? Where is it? I don't mind Japan also having had Breaking Game regardless of Korean Charyuk/Kihapsul influence as long as it's clear that Korea always has had Breaking/Tameshiwari regardless of Karate. It is just that, I don't want to lie; I don't want to share credit. Hence, I was saying that Japan didn't have Breaking Game; Japan got the idea of Breaking Game from Korean Kiaijutsu, not from China. Also, 1933's Karate's Breaking/Tameshiwari did not rotate shoulder for hand strike; Korean sports rotated shoulder for hand strikes with old proofs; Korean sports stacked speed & power instead of implosion & explosion with old proofs. Even if Japan had Kiaijutsu regardless of Korean influence, Karate still copied hand strike techniques from Korea. 1933's Karate's Breaking/Tameshiwari didn't use such techniques. On top of it (it is clear Karate & Mas Oyama copied Korean hand strike for Breaking), the question is whether Japan got the idea of Breaking Game from Korean Kiai Jutsu or whether Japan also always has had Kiai Jutsu and Breaking Game. If Japan also always has had Breaking & Kiai Jutsu, what happened to Japanese Kiai Jutsu today? That's my question. If Japan really did have Kiai Jutsu in the medieval era, I'm gonna have to fix Wikipedia article on Breaking. Breaking (martial arts) - Wikipedia It's also probably going to "feel better" for Japanese ego.