Riki Kimura became an orphan when his family was lost at sea by an army of monsters. He was rescued by a group called the Wavemen, an eighter person Japanese version of the Sea Devils
, and was adopted by their leader, Senior Waveman Otomo. Otomo died while saving Riki's life. Many years later, Riki becomes a well trained superhero, got married to Otomo's genius daughter and have a daughter together ( Kim
/Shiny Happy Aquazon of the Super Young Team
), and has left the Wavemen to join Big Science Action
. He now has changed his title from Junior Waveman to Senior Waveman.