[3] He later made his film debut in Nunuko no Seisen: Harajuku Story, playing Akihisa Kubo, frontman for the fictional band ORION.
[3] In 2019, He played the role of Kaoru in the Y!mobile webseries Parallel School Days, which later gained a theatrical release.
[4] In 2020, He appeared in Kamen Rider Zero-One and its direct-to-Blu-ray spin-off series, Project Thouser, as Naki, a character confirmed by producer Takahito Omori to be genderless.
[5] Nakayama was slated to star in the 2020 theatre adaptation of All About J as Rita Barthelme; however, due to the COVID-19 pandemic, the production was cancelled.
[6] In 2019, Nakayama came out as asexual and non-binary[7][8] on his blog as well as in an interview with Vogue Girl, expressing his desire not to be defined as either male or female.