Niina Masayoshi is the leader of DCU. The group was newly created by the Japan Coast Guard and stands for Deep Crime Unit. Their mission is to find evidence and dead bodies hidden underwater, that are crucial to solving criminal cases. Niina Masayoshi never gives up investigating the truth.

Dive is a two-part British television drama starring Aisling Loftus, Jack O'Connell and Gina McKee. Broadcast on BBC Two in July 2010, the show dealt with the problems of teenage relationships and pregnancy against the backdrop of a young diver's preparations for the 2012 Summer Olympics.

The Aquanauts is an American adventure/drama series that aired on CBS in the 1960-1961 season. The series stars Keith Larsen, Jeremy Slate and Ron Ely.