Mount Yoko (横山, Yoko-yama) is located in the Hidaka Mountains, Hokkaidō, Japan. The mountain has three peaks:

• North Mount Yoko (北横山, Kita-yoko-yama) — 725.3 metres (2,379.6 ft)
• Mount Yoko Middle Peak (横山中岳, Yoko-yama-naka-dake) — 724 metres (2,375 ft)
• South Mount Yoko (南横山, Minami-yoko-yama) — 655.5 metres (2,150.6 ft)