Deletion of Rantahryu

Comment: Doesn't meet otability and I can't find much in the way of third-party coverage, except of the methods of which this is an offshoot of an offshoot.  I can't see a way to shoehorn this in as a sentence in Tang Soo Do, for instance; best left uncovered, I suggest
Stance: delete
Cited policy: Wikipedia:Notability (WP:N)