| Ryū | |
| Ja Kanji: | リュウ |
| Ja Romaji: | Ryū |
| Genre: | Science fiction |
| Type: | manga |
| Author: | Masao Yajima |
| Illustrator: | Akira Oze |
| Publisher: | Shogakukan |
| Demographic: | Shōnen |
| Magazine: | Weekly Shōnen Sunday |
| First: | 1986 |
| Last: | 1988 |
| Volumes: | 7 |
is a shōnen manga written by Masao Yajima and illustrated by Akira Oze. The manga ran in Shōnen Sunday from 1986 vol. 39 through 1988 vol 1.
The adventure manga is about a boy who get transported in a near-future post-apocalyptic world and lead the resistance against the ruling Empire through his knowledge of present days technologies.[1]