He is a member of Oscar Promotion's acting troupe Aoyama Omotesando X. Okuno won the 30th Junon Superboy Contest with over 17,000 applicants in 2017.
[2] According to producer Shinichiro Shirakura, it was particularly difficult to cast a young man who could properly portray Sougo's kingly aura.
He said that Okuno was eventually chosen due to his unique outlook on the world, and considered it an act of fate.
[3] He trained in classical ballet for over 11 years and has incorporated some of it into his transformation pose and Zi-O's fighting skills.
[5] Okuno's hobbies include reading manga and playing video games.