| Tomotaka Sakaguchi | |
| Position: | Outfielder / First baseman |
| Birth Date: | 7 July 1984 |
| Bats: | Left |
| Throws: | Right |
| Debutleague: | NPB |
| Debutdate: | October 7 |
| Debutyear: | 2003 |
| Debutteam: | Osaka Kintetsu Buffaloes |
| Finalleague: | NPB |
| Finaldate: | October 3 |
| Finalyear: | 2022 |
| Finalteam: | Tokyo Yakult Swallows |
| Statleague: | NPB |
| Stat1label: | Batting average |
| Stat1value: | .278 |
| Stat2label: | Hits |
| Stat2value: | 1,526 |
| Stat3label: | Home runs |
| Stat3value: | 38 |
| Stat4label: | RBIs |
| Stat4value: | 418 |
| Stat5label: | Stolen bases |
| Stat5value: | 85 |
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Tomotaka Sakaguchi (坂口 智隆, born July 7, 1984, in Akashi, Hyōgo) is a Japanese former professional baseball outfielder. He played in Japan's Nippon Professional Baseball (NPB) for the Osaka Kintetsu Buffaloes, Orix Buffaloes, and Tokyo Yakult Swallows from 2003 to 2022.
As of 2022, he was the last active NPB player to have played with the Kintestu Buffaloes.[1] On September 28, 2022, Sakaguchi announced his retirement from professional baseball.[2]