From Hojukan Dojo on Facebook:

I love how much fun they are having!!
It’s a good exercise in thinking quickly – the essence of the martial arts. What makes this so perfect, to me, is that they follow the kendo match floor rules and scoring, and appear to be taking what they are doing both seriously and not seriously – the fellow who scores the point shows excellent follow-through (waza). You can’t but notice they are playing for keeps: the squeak hammers are very real.

PS – I had to play a few games including cross-posting the video on youtube so I could link it here without Facebook ageing it out or anything.