Ryūji Yamamoto is a Japanese voice actor born on May 25 in Saitama Prefecture, Japan. His Japanese stage name is written as 山本颯侍. He is affiliated with the talent agency Ken Production, having previously been with DMM Music until April 1, 2022.

Yamamoto has built a career primarily through supporting and guest roles in anime television series, with a concentration of credits appearing from 2020 onward. In 2020 and 2022, he had roles in multiple episodes of Rent-a-Girlfriend, voicing various background characters such as male students, a playboy, and audience members in the first season, and continuing with roles including a high school boy and a character named Rent-a-Red in the second season. That same year, he appeared in The Genius Prince's Guide to Raising a Nation Out of Debt, providing voices for a variety of minor characters including messengers, citizens, guests, guards, lords, subordinates, butlers, soldiers, and a character named Livi.

His other voice credits include roles in Dance Dance Danseur as a soccer club member, The Faraway Paladin as an adventurer and villager over several episodes, Blue Period as Aikawa, Those Snow White Notes as Kaito's classmate and Norio, The Quintessential Quintuplets as a male student, and The Hidden Dungeon Only I Can Enter as multiple characters including Kent PROIX and Mike KENTALL. Among his known roles, he is recognized for voicing Kento from Restaurant to Another World 2.

Yamamoto has also appeared in live-action productions, with a role in the cast of Kekkō Kamen 3 as the character Naojirō. Specific information regarding his roles in Kekkō Kamen 2: We'll be back..... as Kōichi Totsuka and in Weather Woman as Mr. Toshio Takarayama is not attested in the available search results.