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Actor

2001-08-07 · Kobe, Hyogo, Japan · Male

11 series in the catalog

Ryusei Onishi (大西 流星, Onishi Ryusei, born August 7, 2001) is a Japanese idol, actor, and singer. He is a member of the Japanese boy band Naniwa Danshi.

He joined Johnny & Associates as a trainee (Johnny's Jr.) in 2012, became a member of Naniwa Danshi when the group was formed in 2018, and made his CD debut with the group in 2021 with the single "Ubu Love".

Early life

Onishi was born on August 7, 2001, in Hyōgo Prefecture, Japan. He joined Johnny & Associates in 2012, at the age of ten, after being inspired to pursue a career in entertainment.

Before entering the agency, he had studied dance from the age of five.

Career

Shortly after joining the agency, Onishi became a member of the Kansai Johnny's Jr. unit Naniwa Oji.

In 2018, he was selected as a member of Naniwa Danshi. The group made its CD debut on November 12, 2021, with the single "Ubu Love".

In 2022, Onishi produced a collaborative cosmetics line with the brand Ettusais, reportedly becoming the first talent from his agency to do so.

As an actor, Onishi appeared in the television drama Starman: Kono Hoshi no Koi (2013), and later starred in Muchuu sa, Kimi ni. (2021) as Miyoshi Hayashi.

He went on to take leading roles in Kanojo, Okarishimasu (2022) and Benisasu Life (2023), the latter of which featured him as Masato Hojo, a university student who aspires to launch a cosmetics brand, reflecting Onishi's own interest in beauty and makeup.

In film, he appeared in Ninjani Sanjo! Mirai e no Tatakai (2014), Shonentachi (2019), The Good Father (2022), and My Happy Marriage (2023). In 2024, he played Eiji Aihara in We Don't Know Love Yet, his first starring role in a feature film.

Outside of entertainment, he served as a member of an advisory panel for Expo 2025 Osaka, Kansai.

Public image

Onishi is known for his interest in beauty and cosmetics, which has been reflected in his work, including producing a cosmetics collaboration. He has also been noted for his enthusiasm for railways, particularly the Shinkansen. His interest in railways has led to collaborations with railway-related campaigns, including a promotional project with JR Central.