| Katsu! | |
 Katsu! volume 14 | |
| Manga | |
| Written by | Mitsuru Adachi |
|---|---|
| Published by | Shogakukan |
| Imprint | Shōnen Sunday Comics |
| Magazine | Weekly Shōnen Sunday |
| Demographic | Shōnen |
| Original run | August 22, 2001 – March 2, 2005 |
| Volumes | 16 |
Katsu! (stylized as KATSU!) is a Japanese manga series written and illustrated by Mitsuru Adachi. It centers on a freshman student, Katsuki Satoyama, as he discovers his near-legendary skill in boxing. It was serialized in Shogakukan's Weekly Shōnen Sunday from August 2001 to March 2005, with its chapters collected in sixteen tankōbon volumes.