JAPAN SINKS: 2020

The setting for this adaptation is moved from 1970s Japan to 2020, just after the Tokyo Olympics. The story centers on the Mutou family, and the siblings Ayumu and Gou. The four members of the Mutou family are caught in an earthquake that hits Tokyo, and attempt to escape the city, while disaster claws at their heels. (Source: Anime News Network) — Description from AniList community (anilist.co).