An apocalyptic look at the possibility of an earthquake of magnitude 7 or greater striking the Tokyo area. Mirai, a middle school freshman girl who goes to Tokyo's artificial Odaiba Island for a robot exhibition with her brother Yutaka at the start of summer vacation. A powerful tremor emanates from an ocean trench, the famed Tokyo Tower and Rainbow Bridge crumble and fall, and the landscape of Tokyo changes in an instant. With the help of a motorcycle delivery woman named Mari who they meet on Odaiba, Mirai and Yutaka strive to head back to their Setagaya home in western Tokyo.
| Actor | Role |
|---|---|
 Satomi Hanamura(voice) | (voice) |
 Yumiko Kobayashi(voice) | (voice) |
 Yuhko Kaida(voice) | (voice) |
 Christel Takigawa(voice) | (voice) |
 Eri Kitamura(voice) | (voice) |
 Aki Toyosaki(voice) | (voice) |
 Narumi Takahira(voice) | (voice) |
 Aya Endo(voice) | (voice) |
 Ai Nonaka(voice) | (voice) |
 Miyuki Sawashiro(voice) | (voice) |