Yūki Ōtani is a male Japanese voice actor born on July 11 in Tokyo, Japan. He is known for a career that includes work in anime, video games, digital comics, and drama CDs, with his professional activities beginning in the 2010s.

One of Ōtani's notable anime roles is the character Shirō in the series Kyoshin to Hyōka no Shiro, also known as Shiro, the Giant, and the Castle of Ice. This web anime series is set in Minami Shimabara city in Nagasaki Prefecture and follows the story of a junior high school student named Shirō and his friends who encounter a mysterious creature. In addition to this role, Ōtani provided a voice for a character listed as Boyfriend in the popular time-leap suspense anime Tokyo Revengers. Other television anime appearances include minor roles in Aikatsu Stars! as a delivery person and in Blue Lock as Juraki Ito.

Ōtani has an extensive portfolio in video games, where he voices several significant characters. His most prominent game role is Taikou Samonji, a short sword character in the popular online game Touken Ranbu -ONLINE-. He also contributed voice work to the role-playing game Metaphor: ReFantazio. Other game credits include playing multiple characters in Dragon Quest X Online (such as Shasibu, Puresso, and Seriku), Thor in Dark Rebellion, Matcha in Food Fantasy, and Alfard in Stella Chronicle.

Beyond animation and games, his voice can be heard in numerous drama CDs and digital comic series. Notable digital comic roles include Kai in Gekikawa Devil, Kanga Kanon in Kataomoi Mistake!, and Satsuki Sakuma in Kakushita Koi no Owari made. He also performed in BLCD (Boys' Love drama CD) productions and voice dramas.

Throughout his career, Ōtani has been a freelance voice actor, not affiliated with a major talent agency for a portion of his known professional life, though he was previously represented. His personal interests, which he has mentioned in public profiles, include fishing, cooking, soccer, and karaoke.