One Piece Chapter 22, page 19-21: YOU ARE A RARE AND PRECIOUS ANIMAL TOO

By the time young Gaimon woke up, his crew had already sailed away, leaving him behind. Stuck inside the chest, he crawled to the shore, crying out for them to return. Realizing he was stranded, he decided the treasure on the hill was all his. However, he found himself unable to climb the steep hill while trapped in the chest. Over the next twenty years, he used his gun and the "forest judgement" to scare away any other pirates who came looking for the treasure.

Gaimon explains that he has spent the last twenty years protecting the treasure on the hill, even though he cannot reach it himself. Luffy agrees that the treasure belongs to Gaimon. Nami generously offers to help Gaimon retrieve the chests from the hill. Gaimon is deeply touched by their kindness, while Nami angrily tells Luffy to shut up when he questions her sudden helpfulness.

They arrive at the base of the massive rock hill. Gaimon looks up at it emotionally, noting how long it has been since he was last here. Luffy asks why he never asked anyone else for help before, and Gaimon admits he did not trust anyone. He sheds tears of joy, declaring this the happiest day of his life.