Sosuke's Boat is a Toy Boat. There Sosuke plays. He holding Boat in the begin. And later when Ponyo see his boat and making magic to Big-Size. Ponyo and Sosuke carry to outside his house. Sosuke make candles. Ponyo and Sosuke blows to his boat. When Sosuke steer his boat and finding Lisa in Senior Center. After boat travel when shrinking to normal when Ponyo sleeps. But Sosuke pulls Ponyo until to shore. In the end of film Fujimoto give back Boat to Sosuke.