Survival

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

A one-shot based upon Takao Saito's classic Survival, published as part of a series by Shogakukan authors celebrating the turn of the century.

Remake of Saito Takao's Survival from 1976. 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! (Source: Manga Box)