Fujimoto takes poorly to Ponyo's choice of becoming human and living on land. He often finds himself sneaking around outside the house on the cliff by the sea to steal quick glances of his beloved daughter settling into her new home ...until one night when Lisa flings open the window and invites the sea sorcerer in for honey tea. :: [One-shot]
In the movie, it is clearly revealed that Fujimoto was ones human, but gave it up to go life in the ocean so... who was he before? This is my interpretation about who Fujimoto was, how he met Granmammare, how he came to dislike humans that much, and finally decided to stop being a human himself to go life in the ocean together with Granmammare.
Gray is a five year old boy just enjoying his life when he finds a new kind of fish in the ocean. This is the story of how they met. "JUVIA!" He repeatedly screamed her name trudging further in the ocean after the man he assumed took her. He swam out and saw the bucket snatching it up, but the fish was gone. "JUVIA!" he continued calling her name searching in vain.