Japanese honorific title, martial arts related?

[tatsujin]

Hello all! Just joined and my first post!

I am looking at having a custom certificate made for a good friend of mine. It would look like a rank certificate (being done in English and Japanese). I would like to confer a title in the certificate that is not rank or a teaching grade (like renshi, hanshi, etc.). Just something that would be appropriate for saying that he is an important person and friend to our school and organization. At first I thought "dai jo" or "Daijobu" would work. But interwebs indicate that would not be the case. Would anyone be able to help me with this? Hopefully it makes sense. I am happy to clarify however I can. I am going to try an attach an example of the certificate that can be done in case that help. 

Thank you very much!