Ayumu Yokoyama (born 4 March 2003) is a Japanese professional footballer who plays as a forward or winger for Belgian club Genk. Yokoyama previously played for Matsumoto Yamaga, Sagan Tosu and Birmingham City. He spent time on loan at Belgian Challenger Pro League club Jong Genk during the 2024–25 season. In international football, he represented Japan at under-20 level.
