Show Kasamatsu

Kasamatsu was born in Nagoya, Aichi Prefecture, Japan. He was scouted by an agency in Nagoya while in his second year of high school.^[1] After graduation, he moved to Tokyo at age 18. Until around 20, he worked part-time in restaurants while applying for background roles in films.^[2]

He began to take acting seriously after being inspired by other performers on set, later auditioning for small stage plays to gain experience.^[3]

In 2017, Kasamatsu joined the Dongyu Club talent agency after leaving AAA (Triple A). By 2019, he had appeared in 18 television dramas and films in a single year, ranking first among male actors in their 20s for total number of roles.^[4]

Kasamatsu played the rapper SEEDA in the 2020 film Flowers and Rain, his first leading role in a feature film.^[5]

In 2020, a contract dispute arose during his transfer from Dongyu Club to Horipro through Fine Entertainment, following his appearance in Love You as the World Ends (NTV). The disagreement was resolved later that year, and Kasamatsu officially joined Horipro.^[6]

In June 2022, he signed with the U.S.-based management company Brookside Artist Management and talent agency Creative Artists Agency (CAA). In May 2023, Kasamatsu left Horipro to establish his own independent office.^[7]

His international recognition grew with major roles in Tokyo Vice (2022) and Gannibal (2022–2023), the latter distributed on Disney+.

In 2025, Kasamatsu began his activities in South Korea. He appeared in the Netflix film Good News as Denji, the leader of a hijackers^[8], and in the SBS series Taxi Driver Season 3 as Keita Matsuda, the head of the Japanese criminal syndicate Neko Money.^[9] He is set to appear in the South Korean films Scandal and Shaving.^[10][11]

On June 28, 2026, Kasamatsu signed an exclusive management contract with the South Korean agency Star Platinum, marking the beginning of his full-scale activities in South Korea.^[12]

Kasamatsu has described himself as having "intense emotional swings, from high energy to irritation."^[13] His motto is "Life is a journey to find your motto."^[14]

He trains three to four times a week and maintains a large appetite, recalling that he once ate up to seven meals a day as a student-athlete.^[15]