|Baby Kai with his mother Haruka|
|Position||Son of Haruka and Kurobe or Liner, father of Toto, Riki, and Sky|
|Height||Not publicly stated|
|Weight||Not publicly stated|
Kai is a 19-year-old male Commerson's dolphin living at Toba Aquarium. He was the first calf born at Toba Aquarium to survive more than a few days. He was born to Haruka and either Kurobe or Liner on May 25, 1997. His sire has not been tested to this day, though it is no longer possible as Kurobe, Liner, and all other descendants of the two, besides Kai, have passed away.