Nippon Steel Kamaishi Seawaves
| Full name | Nippon Steel Kamaishi Seawaves |
|---|---|
| Union | Japan Rugby Football Union |
| Nickname | Kamaishi Seawaves |
| Founded | 2001 |
| Region | Iwate Prefecture, Tōhoku |
| Ground | Kamaishi City Stadium |
| Coach | Yasuo Suda |
| League(s) | Japan Rugby League One, Division Two |
| 2022 | 5th |
| Official website | |
| www | |
Nippon Steel Kamaishi Seawaves (commonly known as the Kamaishi Seawaves) is a Rugby union football club in Kamaishi, Iwate Prefecture, Japan. It was established in 2001.
At its inception, it was known as Nippon Steel Corporation Kamaishi.