Seita Watanabe

Seita Watanabe (born 25 December 2000) 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.

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.