Also known as: 福永祐一, ユーイチ, いっくん
Former Jockey and horse trainer in Japan. Most famous for being Contrail (Racehorse)'s jockey.
Fukunaga retired on February 2023 to become a horse trainer.
Other horses Fukunaga rode in his career
- Agnes Digital (Racehorse)
- Believe (Racehorse)
- Big Arthur (Racehorse)
- Cesario (Racehorse)
- Cheval Grand (Racehorse)
- Copano Rickey (Racehorse)
- Dantsu Flame (Racehorse)
- Eishin Flash (Racehorse)
- Epiphaneia (Racehorse)
- Fusaichi Pandora (Racehorse)
- Gentildonna (Racehorse)
- Geoglyph (Racehorse)
- Indy Champ (Racehorse)
- Just A Way (Racehorse)
- King Halo (Racehorse)
- Neo Universe (Racehorse)
- No Reason (Racehorse)
- Pixie Knight (Racehorse)
- Rhein Kraft (Racehorse)
- Satono Crown (Racehorse)
- Shahryar (Racehorse)
- Smart Falcon (Racehorse)
- Sounds Of Earth (Racehorse)
- Tosen Jordan (Racehorse)
- Verxina (Racehorse)
- Vivlos (Racehorse)
- Wagnerian (Racehorse)
- Win Variation (Racehorse)