| Katsumasa Chiyo | |
|---|---|
 | |
| Nationality |  Japanese |
| Born | 9 December 1986 (age 37) Tokyo, Japan |
| GT Racing career | |
| Current team | Nissan GT Academy Team RJN |
| FIA GT World Cup career | |
| Debut season | 2017 FIA GT World Cup |
| Current team | Nissan GT Academy Team RJN |
| Racing licence |  FIA Gold |
| Car number | 23 |
| Former teams | KCMG |
| Starts | 23 |
| Championships | 0 |
| Wins | 0 |
| Poles | 0 |
| Fastest laps | 2 |
| Best finish | 12th in 2019 FIA GT World Cup |
| Finished last season | 12th |
| Previous series | |
| 2018–2019 2011–2019 2020-21 2010–2012 2008–2011 2012 2013 | GT World Challenge Asia Super Formula All-Japan Formula Three Championship FIA GT Championship Deutsche Tourenwagen Masters Various GT championships Bathurst 12 Hour |
Katsumasa Chiyo (千代勝正, Chiyo Katsumasa, born 9 December 1986 in Tokyo, Japan) is a Japanese factory racing driver, currently competing in the Autobacs Super GT Series as a factory driver for Nissan. He is a graduate of the Nissan Driver Development Program (NDDP), and a past champion of the Bathurst 12 Hour race, and the GT World Challenge Europe Endurance Cup.