| Masato Kumashiro | |
| Position: | Outfielder / Coach |
| Team: | Saitama Seibu Lions |
| Number: | 84 |
| Birth Date: | 18 April 1989 |
| Bats: | Right |
| Throws: | Right |
| Debutleague: | NPB |
| Debutdate: | June 6 |
| Debutyear: | 2011 |
| Debutteam: | Saitama Seibu Lions |
| Finalleague: | NPB |
| Finaldate: | September 28 |
| Finalyear: | 2022 |
| Finalteam: | Saitama Seibu Lions |
| Statyear: | 2022 season |
| Statleague: | NPB |
| Stat1label: | Batting average |
| Stat1value: | .225 |
| Stat2label: | Hits |
| Stat2value: | 108 |
| Stat3label: | Home runs |
| Stat3value: | 0 |
| Stat4label: | RBI |
| Stat4value: | 29 |
| Stat5label: | Stolen bases |
| Stat5value: | 16 |
| Teams: | As player
As coach
|
Masato Kumashiro (熊代 聖人, born April 18, 1989, in Kumakōgen, Ehime) is a Japanese professional baseball outfielder for the Saitama Seibu Lions in Japan's Nippon Professional Baseball.