[EvaQWmrm]

But they're using shinai, as if they knew something about kendo but were just ignoring it. That's my worry.

I think it's quite obvious that they belong to a "real neenja dojo". they have the all black uniforms, the guy in the mirror is practicing geisha dancing (to sneak in to your castle in disquise). If you watch it in slow motion you can actually see an invisible neenja fly in. and he looks super pissed off.