- The Umibozu, was named after the Umibozu, a sea monster in Japanese mythology, is a special forces group in the employ of the Japanese Maritime Self-Defense Forces as a black operations unit.
- The Umibozu have great skill in strategic combat and sniping, as well as all-out assaults. They are infamous in the underworld, and since they don't officially exist, there is no official name for their unit.