Yoshinori Nakayama is a Japanese voice actor born on July 2, 1996, in Aichi Prefecture. He is affiliated with the talent agency Ancheri. Nakayama began his voice acting career after graduating from the Pro Fit Voice Actor Training Center. Following his training, he initially joined the agency Link Plan, and on April 1, 2025, he transferred to his current agency, Ancheri.

Nakayama is known for his versatility, often portraying a wide range of supporting and recurring characters across many anime series. His extensive list of anime voice credits includes roles in numerous popular shows. He played Jim in How Heavy Are the Dumbbells You Lift? and voiced the Senior Skeleton Soldier in Sleepy Princess in the Demon Castle. He also voiced Akira across two seasons of I'm Standing on 1,000,000 Lives. Other notable appearances include roles in Black Summoner, So I'm a Spider, So What?, and The 100 Girlfriends Who Really, Really, Really, Really, Really Love You. He has also had several roles in series such as As a Reincarnated Aristocrat, I'll Use My Appraisal Skill and Black Rock Shooter: Dawn Fall.

One of his most prominent roles is Rintarō Tsumugi in the 2025 anime series The Fragrant Flower Blooms With Dignity. This role marks a significant step in his career as a main character. Beyond television anime, Nakayama has also worked on video games and dubbing. His video game work includes roles such as Ninja Slayer in Ninja Slayer Neo Saitama Enjo and Iaidō in Go Hell Go. In the field of dubbing, he voiced the Colonel in the Japanese language version of the French animated film Calamity.