|“||There is Sosuke, he is only five years old.||”|
Kōichi is the father of Sōsuke and the husband of Lisa. He is the captain of the fishing boat called Koganei Maru, in the film Ponyo on the Cliff by the Sea directed by Hayao Miyazaki of Studio Ghibli. He was voiced by Matt Damon.
As seen when Sōsuke tried to console his mother after she got angry that Koichi was going on too many sea-travelling runs, Koichi does the best he can for the family even if he has to break his promises.