Kotaro Koizumi

Known For

Pokémon Horizons

Gokusen

Worst to First: A Teen Baseball Miracle

The Pride of the Temp

Yoshitsune

What's So Wrong with "Azatoi"?

Black Pean

Ningen Kansatsu Variety MONITORING

All Movies (24)

• 氷室想介の事件簿3-カリスマ塾長の闇…職員転落死の過去と連続殺人の謎-2026
• Rude to Love2024
• Hare no Hi Cinderella Wedding Dress wo Nihon e! Aru Josei no Chosen2024 · as Yuki Yoshito
• Oshorin2023
• 氷室想介の事件簿２～ベストセラー⼩説に隠された殺⼈事件の謎～2023
• Mokuhihan2022
• The Hound of the Baskervilles: Sherlock the Movie2022 · as Haruto Sutei
• 氷室想介の事件簿～超高層ビル密室殺人の謎～2022
• You're Not Normal, Either!2021 · as Isao Miyamoto
• Family Court Investigator Akira Yamanobou 22017 · as Akira Yamanobo
• Crime Mystery by Kosaku Asahina: Tragedy of Hanasaki Village2016 · as Kosaku Asahina
• Family Court Probation Officer, Akira Yamanobo2016 · as Akira Yamanobo
• Nameless Poison [aka Namonaki Doku]2013 · as Saburo Sugimura
• Samurai Pirates2013
• 家庭教師が解く！～殺人方程式の推理ドリル～2013
• One in a hundred thousand2012 · as Tsukamoto
• Bayside Shakedown the Final: The New Hope2012 · as Shigeru Koike
• Dr. Hisayoshi Suma2010 · as 秋山浩平
• Bayside Shakedown 3: Set the Guys Loose2010 · as Shigeru Koike
• Ano Hi Bokura no Inochi wa Toiretto Pepa yori mo Karukatta2008 · as Kenichi Asakura
• Seicho Matsumoto Drama Special: Wave Tower2006 · as Onogi Takao
• Kamen Rider Hibiki The Movie: Hibiki & The Seven War Oni2005 · as Takeshi
• Negotiator2005 · as Koike
• Bayside Shakedown 22003 · as Shigeru Koike

All TV Shows (62)

• The Royal Family2025 · as Yutaro Sanno
• Missing Persons Investigation Unit: The Missing Truth2025 · as Shinpei Sasazuka
• Worst to First: A Teen Baseball Miracle2023 · as Niwa Shingo
• Black Postman2023 · as Shin Mizuno
• Fixer2023 · as Koji Itakura
• Pokémon Horizons2023 · as Homeroom Teacher (voice)
• Stand Up Start2023 · as Taiga Mihoshi
• The Wall of the Eye2022 · as Tatsuo Hagizaki
• POP UP!2022 · as Monday
• Enzaihan2021
• Mothers in Love2020 · as Saiki Takumi
• What's So Wrong with "Azatoi"?2020
• Byouin no Naoshikata ~Doctor Arihara no Chousen~2020
• Koizumi Kōtarō and Muro Tsuyoshi Jiyū Kimamani Futaritabi2019
• 비밀관계 ~선생님은 동거인~2019
• The Good Wife2019 · as Masahiro Tada
• The Real Culprit2018
• Black Pean2018 · as Gonta Takashina
• Wagaya no Mondai2018 · as [Husband]
• Akira and Akira2017
• Chef: Three Star School Lunch2016 · as Shogo Shinoda
• Cinderella Formula2016 · as Igarashi Toru
• The Unbroken2016
• Keishicho Zero Gakari2016 · as Kobayakawa Fuyuhi
• Shitamachi Rocket2015
• Shi no Zōki2015 · as Kyota Numazaki
• Age Harassment2015 · as Akihiko Hoshina
• Petero no Soretsu2014 · as Saburo Sugimura
• Funeral Parade of St.Peter2014
• Owakon TV2014 · as Keisuke Mihashi
• Platonic2014 · as Kazuhisa Mochizuki
• Keiji Yoshinaga Seiichi Namida no Jikenbo2013
• Nameless Poison2013 · as Saburo Sugimura
• 魔性の群像 刑事・森崎慎平2013
• Midnight Ferris Wheel2013 · as Maa-kun / Kojima Masaomi
• Otasukeya Jinpachi2013 · as Iguchi Tatsuya
• Ningen Kansatsu Variety MONITORING2012
• 小京都連続殺人事件2012
• Princess of the Frog2012 · as Tetsuro Isaka
• Will The Luxury Of Love Ever Fall My Way?2012 · as Iida Takeshi
• 松本清張サスペンス (テレビ東京)2011
• HUNTER - Women After Reward Money2011 · as Goro Terashima
• Secret Relationship: The teacher is my housemate2011 · as Kobayashi Naoki
• 悪党～重犯罪捜査班2011 · as Keiichiro Satonaka（里中 啓一郎）
• Goodbye Alma2010 · as Sgt Seiji Ogata
• Gakeppuchi no Eri - Kono yo de ichiban daiji na 'Kane' no hanashi2010 · as Masamune Hiraizumi
• Love Call Center2009 · as Tokura Wataru
• Bad Dad2007 · as 丸山洋介
• Hanayome to Papa2007
• The Pride of the Temp2007 · as Kensuke Satonaka
• 松本清張ドラマスペシャル 波の塔(2006年版)2006
• Time of Distrust ~ Women's Wars2006 · as Kei Kondo
• Attention Please2006 · as Shuusuke Tsutsumi
• Gachi Baka!2006 · as Genki Watanabe
• Slow Dance2005 · as Yuta Yajima
• Yoshitsune2005 · as Taira no Sukemori
• Objection!2004
• You are my only Madonna2003 · as Takashi Nakano
• 狂った果実20022002
• Gokusen2002 · as Seiichi Natsume
• Nurseman2002
• Home & Away2001