Did Japan have Kiai Jutsu before 20th century? What happened to it today?

[Xue Sheng]

As usual, you don't have any other possible conclusions not contradicting my referenced facts.

As usual many have told you about other possible conclusions and your refusal to accept them does not mean there are none

 

[Same Trick]

Kiai jutsu = breaking boards ??
I thought it was about spirit “shout”, and that for sure has been around in Japan long time.
Find some vid of Jigen-ryu and you’ll know.

 

[Gyakuto]

Kiai means ‘unification of Ki [and body]’. It does not require any vocalisation and can be accomplished silently. This is how it’s used in many schools of swordsmanship. The shout, if used, is known as ‘kakegoe’.

 

[Hot Lunch]

Well, I will say that it looks like Korean striking arts do a helluva lot more breaking than Okinawan and Japanese karate. I don't know where breaking originated, and I don't care. I'm not too concerned about breaking as, as the late great Bruce Lee once said, "Boards don't hit back."

 

[Gyakuto]

, as the late Bruce Lee once said, "Boards don't hit back."

I don’t think board breaking is about enhancing fighting ability. It’s about testing one’s mettle by doing something difficult and indeed painful, using one’s natural weapons. It is a bit silly, though.