I must have missed the part where Yamada had a bokken. Maybe you could give us the time marker?
Yamada has, actually, taught bokken - once that I've heard of, but it's very unusual for him.
Aha, a mistake! Yes, I suppose that must be Tamura Sensei then. Y ou got me, I will live in shame the rest of my life ha, ha.
No, seriously though, we still haven't found any shihan who never taught or
As I said, it's a no brainer to me that somewhere along the line they learned or tauhgt bokken also that being in the martial arts world and Japanese somewhere along the line they would have a sword and know quite a lot about it's use. I bet Yamada's got a samurai sword in his house.