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Kôji Seto

  • Actor
IMDbProStarmeterSee rank
When her 5-year-old daughter dies, a mother is devastated but finds solace in a doll that looks like her daughter and begins to treat the toy as part of the family. But after giving birth to another child, strange things begin to happen.
Play trailer1:14
Dollhouse (2025)
3 Videos
1 Photo
Koji Seto was inspired to become an actor when he saw Tsumabuki Satoshi, a fellow Fukuoka-born actor, starring in the TV drama series "Orange Days". He was a student at the Fukuoka Actors School, which is part of the renowned Himawari Acting School. He took on his first role 2005 in the TV Drama "Rocket Boys" and won in the same year a audition for Watanabe Entertainments Acting Group D-BOYS. It was also the year when he moved on his own to Tokyo, with just 17 years. He successfully took on several roles in TV, movie and stage productions.

In 2008 he became the first actor who appeared in two leading parts, aired on TV at the same time, starring as Wataru Kurenai in "Kamen Rider Kiva" and Hiro in the TV-drama adaption of "Koizora". A wide range of different leading parts followed, like 2010 as mentally disabled teenager Shuhei in "Rinne no Ame", a drama that won Fuji TV's 21th Best Young Screenwriter Award, and as Yuta, the captain of a male-tumbling team in the sport drama "Tumbling". 2011 he starred as the brave young Samurai Mori Ranmaru, alongside Etsushi Toyokawa as Nobunaga Oda, in NHK's Taiga Drama "Princess Go".

2012 appeared he in the sequel of the "Ring" movie series "Sadako 3D" as Takanori Ando. Also 2012, Director Shiota Akihiko choose him to star in the tv drama "Spy Tokku", a story about a spy that underwent a face transplantation when he started his job with only 19 years.
BornMay 18, 1988
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BornMay 18, 1988
IMDbProStarmeterSee rank
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    Known for

    Kamen Rider Kiva: King of the Castle in the Demon World (2008)
    Kamen Rider Kiva: King of the Castle in the Demon World
    5.9
    • Wataru Kurenai
    • Kamen Rider Kiva
    • 2008
    Kamen Rider Movie War 2010: Kamen Rider vs. Kamen Rider W & Decade (2009)
    Kamen Rider Movie War 2010: Kamen Rider vs. Kamen Rider W & Decade
    6.8
    • Wataru Kurenai
    • Kamen Rider Kiva
    • 2009
    Kamen Rider Kiva (2008)
    Kamen Rider Kiva
    7.4
    TV Series
    • Wataru Kurenai
    • Kamen Rider Kiva
    Kamen Rider Decade (2009)
    Kamen Rider Decade
    7.0
    TV Series
    • Wataru Kurenai
    • Kamen Rider Kiva

    Credits

    IMDbPro

    Actor



    • Mao Inoue, Kôji Seto, and Ryoma Takeuchi in Silent Truth (2026)
      Silent Truth
      6.5
      TV Series
      • Keisuke Kiyohara
      • 2026
    • Kobikicho no Adauchi (2026)
      Kobikicho no Adauchi
      7.0
      • Kazuya
      • 2026
    • Masami Nagasawa in Dollhouse (2025)
      Dollhouse
      6.5
      • Tadahiko Suzuki
      • 2025
    • 119 Emâjenshî kôru (2025)
      119 Emâjenshî kôru
      7.6
      TV Series
      • Mutsuo Kaneshita
      • 2025
    • Suomi no Hanashi wo Shiyou (2024)
      Suomi no Hanashi wo Shiyou
      5.6
      • Morio Koiso
      • 2024
    • Ryubi Miyase, Meru Nukumi, Kôji Seto, and Fûju Kamio in Kururi: Dare ga Watashi to Koi wo Shita? (2024)
      Kururi: Dare ga Watashi to Koi wo Shita?
      7.1
      TV Series
      • Koutaro Nishi
      • 2024
    • Ikoi Hayase and Yui Aragaki in Worlds Apart (2024)
      Worlds Apart
      6.5
      • Shingo Kasamachi
      • 2024
    • Masachika Ichimura, Kenta Kiritani, Kôji Seto, and Neru Nagahama in In'nai keisatsu (2024)
      In'nai keisatsu
      4.6
      TV Series
      • Shunsuke Sakakibara
      • 2024
    • Maboroshi (2023)
      Maboroshi
      6.4
      • Akimune Kikuiri (voice)
      • 2023
    • Invert Jozuka Hisui Toujoshu (2022)
      Invert Jozuka Hisui Toujoshu
      6.9
      TV Mini Series
      • Shiro Kogetsu
      • 2022
    • Kaya Kiyohara in Medium (2022)
      Medium
      7.2
      TV Series
      • Kogetsu Siro
      • 2022
    • Shun Oguri in The 13 Lords of the Shogun (2022)
      The 13 Lords of the Shogun
      8.0
      TV Series
      • Hôjô Tokitsura
      • Hôjô Tokifusa
      • 2022
    • Love Nonetheless (2022)
      Love Nonetheless
      6.4
      • Tada Koji
      • 2022
    • Fumiyo Kohinata, Masami Nagasawa, and Masahiro Higashide in The Confidence Man JP: Episode of the Hero (2022)
      The Confidence Man JP: Episode of the Hero
      6.4
      • Marcel Marimura
      • 2022
    • Lupin's Daughter: The Movie (2021)
      Lupin's Daughter: The Movie
      5.1
      • Kazuma Sakuraba
      • 2021

    Videos3

    Official Trailer
    Trailer 1:14
    Official Trailer
    Sadako 3D
    Trailer 1:39
    Sadako 3D
    Sadako 3D
    Trailer 1:39
    Sadako 3D
    Ju-on: Black Ghost
    Trailer 1:06
    Ju-on: Black Ghost

    Personal details

    • Alternative name
      • Koji Seto
    • Height
      • 5′ 8½″ (1.74 m)
    • Born
      • May 18, 1988
      • Kama, Japan
    • Spouse
      • Mizuki YamamotoAugust 7, 2020 - present
    • Relatives
      • Saori Seto(Sibling)

    Did you know

    • Trivia
      His childhood dream was to become a vet.
    • Nickname
      • Setomaru

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