Going back and reading Hakka-ya's stuff and I love it, but this page always eats away at me: http://dynasty-scans.com/chapters/kiyosumi_captain_monogatari#22.
Mihoko wins the hand saying, "Tsumo! 12000 All!" and then the commentator says she gets a successive yakuman. So the "successive" part of the yakuman I'm not 100% sure what that means, but as far as tsumo-ing 12000 from all the players, the only ways to do this are not with yakuman hands. She could get that score if she's dealer and tsumo's (self-draws) a sanbaiman (11-12 han, 1-2 han less than what's needed for a yakuman), or by winning 40 hands in a row as dealer and tsumo-ing a baiman (8-10 han), or a few other ways that require an increasing amount of absurdity. Regardless, if she's dealer and tsumo's a yakuman, she should say "Tsumo! 16000 All!" and get a total of 48000, not the 36000 shown.
I feel better now.