Also known as: 横山典弘, ノリさん
Japanese Jockey. Father of Kazuo and Takeshi, who've followed his footsteps and have become jockeys as well.
Horses Yokoyama rode in throughout his career
- Buena Vista (Racehorse)
- Danon Decile (Racehorse)
- Gold Ship (Racehorse)
- Ingrandire (Racehorse)
- Just A Way (Racehorse)
- Kawakami Princess (Racehorse)
- Kitasan Black (Racehorse)
- Logi Universe (Racehorse)
- Mejiro Ryan (Racehorse)
- One And Only (Racehorse)
- Sakura Laurel (Racehorse)
- Seiun Sky (Racehorse)
- Taiki Shuttle (Racehorse)
- Tanino Gimlet (Racehorse) - Only on his debut race