What is master karate instructor in Japanese?

Answer:
'Sensei' is appropriate for all instructors. A master may be referred to as Hanshi, but we only use the title when talking with others, not as a form of address when talking with him.
Contributor: Aggie80
First answer by Lukeforward. Last edit by Aggie80. Contributor trust: 4983 [recommend contributor recommended]. Question popularity: 2 [recommend question].