Maybe he was referring to the particular one he's using, but otherwise you're supposed to used the back of the blade for certain blocks and parries (for lack of a better term to explain certain techniques used in TSKSR, or Yagyu shinkage-ryu). What is certain though is you avoid as much as possible using techniques in which edge meets edge. In kenjutsu the main goal is to cut your opponent without having to clash against his sword.
I'm not sure where the person heard that striking with the back edge of a katana will break the sword. That's not true at all.
Probably the same source that says katana can cut through titanium and folded 3 million times
Maybe he was referring to the particular one he's using, but otherwise you're supposed to used the back of the blade for certain blocks and parries (for lack of a better term to explain certain techniques used in TSKSR, or Yagyu shinkage-ryu).
What is certain though is you avoid as much as possible using techniques in which edge meets edge. In kenjutsu the main goal is to cut your opponent without having to clash against his sword.
Does Jeff has a JSA background? His kamae and seme is ON POINT
Yes, not sure which one exactly though
What is JSA, is that like japanese version of SCA?