Sion Yoshitaka, born July 2, 1999, in Tokyo, Japan, is a Japanese actor and voice performer. He began his entertainment career in 2018, making his stage debut in the idol-themed play Anplanet: Back to the Past. Early in his career, he was a member of the idol unit Hi!Superb before graduating from the group in December 2019. He is represented by the agency Stardust Promotion, having previously worked with Assist Inc.

While Sion Yoshitaka is active in both live-action and stage productions, he has become particularly known for his work in voice acting. His most prominent anime role to date is Shin Kashiwagi in the 2025 romantic anime series Anyway, I'm Falling in Love with You. He also voices the character Elf from Yokohama in the 2025 series Kanagawa ni Sunderu Elf: Dokidoki! Elfdoki!.

His career is heavily rooted in 2.5D musical theatre, which are stage adaptations of anime, games, and manga. He has performed in numerous popular stage productions, holding significant roles such as Azami Izumida in the A3! musicals, Judas Jr. in SHOW BY ROCK!!: Bloody Labyrinth, Nagare Hisui in K: RETURN OF KINGS, and Seiji Yagiri in Durarara!!. Additional stage credits include Ikemen Prince: Last Love at the End of the Beast, Onmyoji, and Moriarty the Patriot. He has also appeared on television in the drama Yabusaka de wa gozaimasen.

Beyond acting, Sion Yoshitaka is recognized for his multilingual abilities, speaking Japanese, English, and Chinese. He was the recipient of the first Music Pop Boy Audition award titled Awesome Pop Boy. He is also known for his skills in basketball, singing, and drawing, and has published a photobook titled Love Myself.