| Tsuyoshi Yoneyama | |
| Birth Date: | 15 March 1965 |
| Birth Place: | Kanagawa Prefecture, Japan |
| Weight: | 73kg (161lb) |
| Status: | Professional |
| Extour: | Japan Golf Tour |
| Prowins: | 6 |
| Japwins: | 3 |
| Otherwins: | 3 |
| Masters: | DNP |
| Usopen: | DNP |
| Open: | T15: 1999 |
| Pga: | DNP |
is a Japanese professional golfer.
Yoneyama was born in Kanagawa Prefecture.[1]
Yoneyama has won three tournaments on the Japan Golf Tour and featured in the top 100 of the Official World Golf Ranking. His most successful year was 1999 when he won three times and finished tied 15th in The Open Championship.
| No. | Date | Tournament | Winning score | Margin of victory | Runner-up | |
|---|---|---|---|---|---|---|
| 1 | 30 May 1999 | Mitsubishi Motors Tournament | −16 (69-69-66-64=268) | Playoff |  Kazuhiko Hosokawa | |
| 2 | 29 Aug 1999 | Hisamitsu-KBC Augusta | −11 (70-66-69=205)* | 1 stroke | Takao Nogami | |
| 3 | 28 Nov 1999 | Casio World Open | −14 (70-71-68-65=274) | 1 stroke | Taichi Teshima |
Japan Golf Tour playoff record (1–1)
| No. | Year | Tournament | Opponent(s) | Result | |
|---|---|---|---|---|---|
| 1 | 1999 | Descente Classic Munsingwear Cup | Kazuhiko Hosokawa, Masayuki Kawamura | Kawamura won with birdie on second extra hole | |
| 2 | 1999 | Mitsubishi Motors Tournament | Kazuhiko Hosokawa | Won with birdie on fifth extra hole |