Marius Yo (マリウス 葉, Yō Mariusu, born March 30, 2000)[1] is a former Japanese singer, songwriter, actor and tarento.

His father is German and his mother, Eri Yo (stage name: Akira Yo), a former Takarazuka Revue actress who is a Japanese national of Taiwanese descent.

[4] Yo joined Johnny & Associates in January 2011 and debuted together with Kento Nakajima, Fuma Kikuchi, Shori Sato, and So Matsushima as the youngest member of idol group Sexy Zone in November 2011.

On December 2, 2020, it was announced that Marius would go on hiatus due to poor health.

On December 31, 2022, during Johnny & Associates's annual countdown event "Johnny's Countdown 2022-2023", he performed with Sexy Zone for the final time and retired from the entertainment industry.