It used to be a commonplace (and interesting) to see Japanese people frequently take out their stamp for anything requiring a "signature" but in recent years I really haven't seen it happening much. I was always able to use a signature on any official document and I think this has become a much more acceptable form of verification for Japanese people nowadays.

Also, it's a shame those episodes are geoblocked in Japan since some of the people who'd most enjoy and benefit from them are people who're visiting Japan for an extended period.