Okay, the hilarious Hakuho/Tochiozan match had more going on than I noticed when I watched this morning. I obviously saw the henka but I didn’t notice the hand-clapping. The clap is called neko damashi. Mainoumi, who is frequently the Japanese commentator for NHK, was famous for this move. Apparently the Japanese media is all aflutter because they think the trick is not becoming of a yokozuna, nevermind the fact that he did it twice and topped that with a henka.
Mainoumi could get away with it because he was tiny and needed to pull out all the stops to succeed. This is another bit of silliness.