This article is about a character from Ponyo on the Cliff by the Sea. For information about the Pom Poko character with a similar name, see Sasuke.

Don't worry, Ponyo. No matter what, I will protect you. I promise. - Sōsuke promises that he will protect Ponyo

Sōsuke is the slender five-year-old protagonist of Ponyo. He is Ponyo's best friend and owner.


Sosuke is intelligent, smart, loyal, cute and heroic. He is willing to protect his friends (including Ponyo starting from when she washes up on the shore near the house), even if doing so would get him in trouble with his mother or Ponyo's father (whom they hate). He is interested in the sea, especially since his father, Koichi is the captain of the ship. He also knows that Koichi does his best for the family as seen when Lisa gets angry at Koichi and chides him for abandoning her family on a cliff.


Sosuke is a 5-year-old boy who wears a yellow t-shirt and brown shorts. His hair is dark brown with his hair shaven underneath. Also, he wears a sailor hat and binoculars.

​Role in the film

Sosuke is first seen when Lisa calls Sosuke come back home and he discovers Ponyo.

Ponyo and Sosuke underwater

Ponyo and Sosuke dive face in the Water


Sosuke is a 5-year-old boy and loves Ponyo in her human form.

Sōsuke holds Ponyo in pail

Behind by Voices

Sosuke was portrayed by Hiroki Doi in Japanese of 2008 and in English he as voiced by Frankie Jonas.


Sosuke uses his Toy boat and green bucket until Ponyo come back her human form with a sailor hat and binoculars.


  • The "U" in his name is not pronounced.
  • He appears similiar to Kanta from My Neighbor Totoro when he wears a sailor hat.
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