Like Chang, he came to Japan in order to seek money to get out of poverty.
He and his family lived in poverty in the Philippines in an massive landfill called the Smokey Mountain. Their daily lives and income consisted of salvaging garbage from around the area, an unhealthy practice. Wanting to get out of his situation he decides to seek fortune in Japan for a better future for both him and his family.
Tobaku Datenroku Kaiji: Kazuya-hen Edit
He is first introduced in the series when he and Change barge into the room and offer their kidneys in exchange for paying off Mitsuyamas debt. Kazuya, being in the same room and witnessing this, offers them to play in his game, the Salvation game to pay off their debt.
After losing in the Salvation Game, Kaiji picks him and Chang up before he gambles with Kazuya. Like Kazuya when he first met the three, Kaiji also considers them as gems due to the strong bond of friendship they showed during the Salvation game and believes they could help him win the gamble by being there with him.
Tobaku Datenroku Kaiji: One Poker-hen Edit
He and Chang bet their lives on Kaiji in One Poker in order to save him from his first defeat.
By betting their lives lives, they manage to force Kazuya to bet his own life as well towards the end of the gamble.