Why is it hard to find?

Question

Koppo is a Japanese martial art where those who

practices it uses open hand strikes yet I can't find

much about it, why is it so hard to find anything

much about this art?

Answer 1

Because it sucks.

Answer 2

Because it is not popular.

Answer 3

Because it';s redundant all styles use open hand strikes.

Answer 4

I may be wrong but I don't believe Koppo is a Japanese Martial Art. Koppojutsu is a japanese term meaning attacks against the bones. You may be looking for something more along the lines of Koto-Ryu.