"I saw a dead cat. He should have come to this world to scatter his guts. I would die in this way."
"There wasn't a single truth if I say that, it all become lies. Tomorrow it will melt and disappear like the snow and yet, you call my name which the only thing revives me. Everything about you is my soul of words." –Kubota referring to Tokito
He's a high school student but no one knows if he's still studying. According to Dice 44 of the manga, Makoto was able to finish high school and after that, he left Kasai san's home to live on his own.
He learned to play mahjong through a book that his uncle kept at his home after some time during his stay at his uncle's house when he was thirteen.