| Tsuyoshi Shimoyanagi | |
| Position: | Pitcher |
| Birth Date: | 16 May 1968 |
| Birth Place: | Nagasaki, Japan |
| Bats: | Left |
| Throws: | Left |
| Debutdate: | August 9 |
| Debutyear: | 1991 |
| Debutteam: | Fukuoka Daiei Hawks |
| Statleague: | NPB |
| Stat1label: | Win–loss record |
| Stat1value: | 129-106 |
| Stat2label: | Earned run average |
| Stat2value: | 3.92 |
| Stat3label: | Strikeouts |
| Stat3value: | 1,418 |
| Stat4label: | Saves |
| Stat4value: | 22 |
| Stat5label: | Holds |
| Stat5value: | 0 |
| Teams: | |
is a former Nippon Professional Baseball pitcher who played for the Hanshin Tigers in Japan's Central League and for the Fukuoka Daiei Hawks, the Hokkaido Nippon-Ham Fighters, and the Tohoku Rakuten Golden Eagles in Japan's Pacific League.