| Seita Watanabe | |
| Birth Date: | 2000 12, df=yes |
| Birth Place: | Fukushima, Japan |
| Height: | NaN1.80 |
| Plays: | Right-handed (two-handed backhand) |
| Careerprizemoney: | $29,083 |
| Singlesrecord: | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Singlestitles: | 0 |
| Highestsinglesranking: | No. 915 (25 July 2022) |
| Currentsinglesranking: | No. 1502 (16 October 2023) |
| Doublesrecord: | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Doublestitles: | 9 ITF |
| Highestdoublesranking: | No. 287 (17 July 2023) |
| Currentdoublesranking: | No. 351 (16 October 2023) |
| Updated: | 16 October 2023 |
is a Japanese tennis player.
Watanabe has a career high ATP singles ranking of 915 achieved on 25 July 2022. He also has a career high ATP doubles ranking of 287 achieved on 17 July 2023.[1]
Watanabe made his ATP main draw debut at the 2023 Japan Open Tennis Championships after entering the doubles main draw with Takeru Yuzuki as lucky losers.