DEEP 57 Impact was held Saturday, February 18, 2012, at the Tokyo Dome City Hall in Tokyo, Japan.
Amanda "Powerhouse" Lucas, daughter of STAR WARS creator George Lucas, won her fourth straight MMA fight with a submission victory over Japanese pro wrestling star Yumiko Hotta, who last fought in mixed martial arts in 2000. Hotta proved to be no push-over, though, and made Lucas work for this victory. Lucas was finally able to put away the Japanese fighter in the third round with an Americana.
In the main event, DEEP Lightweight Champion Mizuto Hirota won his second straight fight since coming back from a horrific broken arm against Shinya Aoki. Hirota won a unanimous decision over Seichi Ikemoto, although once again Hirota took a lot of damage in the process, as he did in his last fight, a decision win over Katsunori Kikuno.