Fujimoto hardly got used to the floor of ordinary life, yes, he was a man, however, he was a talented potions master and guardian of the sea lands and their inhabitants, so after his daughter Ponyo finally became a man and lived with Sousuke and his mother Risa, it was difficult focus on ordinary days and the things of human life. He was returning home (actually to his sea ship) late at night and suddenly stumbled upon someone

"Oh, I'm sorry"