| Team | JR Kyushu |
|---|---|
| Position | Shortstop |
| Birth date | June 9, 1980 (age 46) |
| Birth place | São Paulo, Brazil |
| Bats | Right |
| Throws | Right |
Marcio Keizo Tanaka (born June 9, 1980) is a Japanese-Brazilian professional baseball shortstop, who plays for a team in the Japanese Industrial League. He attended Tokyo University of Agriculture and represented Brazil at 2013 World Baseball Classic.