Ryuu Kaiou

He is the head of the temple in Heilong-Jiang, China and mentor of Kaioh Retsu.

Ryu Kaioh has displayed to be very strict, disciplined and will not accept failure as shown when his disciples take the test so he can pass on the name of Kaioh believing that the next Kaioh should be strong and skillful he at first denies Retsu Shaorin the title but under the recommendation of Kaioh Dorian allows Retsu the title.

(Source: Baki Wiki)