Youji Murai is a Japanese voice actor affiliated with the talent agency Stay Luck. He began his entertainment career in 2013 as a participant in the theater troupe WAHAHA Honpo before joining the Stay Luck training workshop in 2015 and becoming an official agency member in 2016. He is a native of Akita Prefecture.

Murai has built a career characterized by extensive voice work in anime television series, video games, and film dubbing. In anime, he is known for a wide range of supporting and guest roles in major productions. His credits include appearances in long-running and popular series such as Jujutsu Kaisen, My Hero Academia, SPY x FAMILY, Frieren: Beyond Journey's End, and The Ancient Magus' Bride. He also had a recurring role as Kentarō Habara in Boogiepop and Others. In the film Suzume, he contributed voice work as part of the cast.

In the realm of video games, Murai has lent his voice to prominent titles including the Ryu ga Gotoku series (Like a Dragon), Judge Eyes, Samurai Spirits, Princess Connect! Re:Dive, and Monster Strike. His early career includes a role as the protagonist Cain Asbell in the 1999-2001 original video animation series MeiKing.

Murai is also active outside of traditional voice acting. He co-hosts a YouTube channel dedicated to video games with fellow voice actor Yuki Hashimoto. He has further contributed to audiobook narrations and drama CDs.