Survival (Takao Saito)

Survival (サバイバル) is a manga written and illustrated by Takao Saito. It was serialized in Weekly Shōnen Sunday from 1976 to 1978. A sequel, Survival: Another Story is a manga written by SAITO Takao and illustrated by MIYAGAWA Akira. It was serialized in Weekly Shōnen Sunday in 1980. A remake, Survival: Shounen S no Kiroku is a manga written by SAITO Takao and illustrated by MIYAGAWA Akira. It was serialized in Mangabox from Apr 30, 2015.

Survival
An inexplicable catastrophe plunges Japan to the bottom of the ocean. A boy survives the misfortune, but he has been abandoned in a land surrounded by sea on all sides. His effort to stay alive compels him to sharpen his wit, as he finds that nothing he learned in school is useful for staying alive.

Survival: Shounen S no Kiroku
Could you survive in the wilderness that has lost all civilization? A huge earthquake occurs while Satoru and his friends are exploring a cave. After somehow making it to the surface, Satoru is shocked by the scene that lays before his eyes. From that day on, the lonely battle for survival begins!