Daisuke was the first person I ever saw clear Stage 1. And he was my first "favorite" competitor.
He had the surgery late last year and is back on Muscle Musical but he does mention that he has had a few limitations so he tailored his program to fit within those confines. He is much better but dunno if he'll be back. Granted.. MM wasn't back in 25 and not sure if they will return.. and if they return.. if Nakata will be part of that group. I wouldn't be surprised given all the hanging obstacles, etc. that he might forgo going on the show just to save his body for his livelihood. One can only take so many surgeries.