I have a question on Kasai no Genri.
Per the above link on wikipedia, it says that it was used by Goju-ryu masters, with no mention of use by any other styles (aside from the portion about the meaning of angles from Kenwa Mabuni).
Can anyone elaborate on why this references only Goju-ryu? It seems odd that this would not apply to other karate styles; it seems to me that it’s not just Goju-ryu karate-ka training realistic bunkai but that other styles make use of these principles too.
The only reason I can think of is that maybe the wikipedia contribution was written by a Goju-ryu practitioner – though I would have thought others would have corrected it by now if that was the case.
Any feed-back, and other sources of reference on this topic would be appreciated.