Inspirational demonstration. I like the version where it is, in effect, an inverted, powerful forward stroke. I particularly like how you finish leaning over the foredeck (as opposed to laying on your back as commonly taught) which I think puts you in a more favourable position if conditions are really hairy.
This is a lovely video Eiichi-san. I hope to see you again when this pandemic dies down! I was able to get a Tahe Greenland kayak so now I'm really inspired to learn this roll!