Mantarō Koichi (小市 慢太郎 , Koichi Mantarō), born on February 15, 1969 in Osaka, is a Japanese actor. He occasionally does voice work for anime and TV dramas. He's affiliated with Gekidan M.O.P., an agency that mostly assigns work for live action movies and TV series. His bloodtype is B.

KNOWN FOR

AIBOU: Tokyo Detective Duo
2004
99.9 Criminal Lawyer
2016
The Files of the Young Kindaichi
2022
CSI: Crime Scene Talks
2013
Emergency Room 24 Hours
2005
Galileo
2007
Ryōmaden
2010
Cold Case: Door of Truth
2018
Hero
2014
Bungo Japanese Literature Cinema
2010
Suits
2018
Hanasaki Mai Speaks Out
2015

FILMOGRAPHY

All
Movies
TV
Acting
108
2026
悪魔の手毬唄
2024
Unmet: Diary of a Neurosurgeon
as Takami Takeshi
2023
Wave, Listen to Me!
as Kureko Katsumi
2023
The Inugami Family
as Isokawa
2022
The Sunday Runoff
2022
We're Both Grooms
as Seto Takeshi
2022
Evil God's Balance Public Security Analysis Team
as Shuzo Kunieda
2022
Two People Who Can't Fall in Love
2022
What Do You Really Do About Love?
as Jiro Okashita
2022
The Files of Young Kindaichi
as Ken Izumaru
2022
The Files of the Young Kindaichi
as Ken Izumaru
2021
The Agent Family
as Toshio Sato
2020
One Left Hand Shot
2020
Care Nin 2: The Flower in Your Heart
as Hirofumi Kudo
2020
Fukushima 50
as Chairman of Japanese Nuclear Safety Commission
2020
Mellow
as Furukawa Sakon
2020
Memory's Technique
as Kazuno Tadashi
2020
Nozaki Shuhei President of Bank
as Ryoma Kashiwagi
2020
Gourmet Detective Goro Akechi
as Yasuya Dateh
2020
The Sun Does Not Move
as Miura
2019
A Long Goodbye
2019
Yatsuhakamura
as 磯川警部
2019
Only the Cat Knows
as Masaki
2019
Sherlock: Untold Stories
as Takahisa Inui
2019
Voice
as Kenichi Tadokoro
2019
Innocence, Fight Against False Charges
as Rintaro Ibusuki
2018
Neck Bowed in the Rain
as Jingoro Gyoda
2018
Perfect World
2018
For Love's Sake
2018
Colors of Wind
as Kitta
2018
My Friend "A"
as President Kawashima
2018
White and Yellow ~My Pancake Story from Hawaii~
as Sawano Kyoji [Nami's uncle]
2018
Suits
as Yukio Karashima
2018
Kiss that Kills
as Gunji Arai
2018
Nozaki Shuhei - Auditor of Bank
as Ryoma Kashiwagi
2018
Cold Case: Door of Truth
as Yasui
2017
Blossoming Into a Family
as Seishiro Ishikawa
2017
Radiance
as Sano
2017
Care Nin
as Hirofumi Kudo
2017
Tales of the Bizarre: 2017 Fall Special
2017
Error
2017
FACE - Cyber Hanzai Tokusouhan
2017
Akira and Akira
2017
CRISIS: Special Security Squad
2017
Moribito: Guardian of the Spirit
as The Cooles
2016
Death on Gokumon Island
as Inspector Isokawa
2016
Prison Gate Island
as Inspector Isokawa
2016
Sniper
as Satoru Kanbe
2016
Somebody's Xylophone
2016
The Tokyo Wind Orchestra
as Kazuya Tachibana
2016
Lost ID
as Baba
2016
Destiny-Like Love
as Fujii Yoji
2016
99.9 Criminal Lawyer
as Inaba
2015
Gassoh
2015
Ghost Theater
as Gota Nishikino
2015
Till Death Do Us What?
as Yamashita
2015
Scarecrow and Racket: Aki and Tamako’s Summer Vacation
as Masaya Odagiri
2015
Before a Falling Star Fades Away
as 奈緒子の父
2015
Hanasaki Mai Speaks Out
as Takahiko Isobe
2014
A Samurai Chronicle
2014
Tokyo Refugees
as Kobayakawa
2014
Rurouni Kenshin Part II: Kyoto Inferno
as Toshiyoshi Kawaji
2014
Rurouni Kenshin Part III: The Legend Ends
as Toshiyoshi Kawaji
2014
Miracle: Devil Claus' Love and Magic
as Natsuki Kurita
2014
Shinigami-kun
2014
Nobunaga Concerto
as Yoshikage Asakura
2014
Hero
as Yagi
2014
The Hours of My Life
as Akio Sawada
2013
The Sparkling Amber
2013
The End of Summer
2013
CSI: Crime Scene Talks
2013
Kurokouchi
as Ushii Takeshi
2012
Piece: Fragments of a Memory
as Tojiro Tsuda
2012
Wonderful Single Life
as Shuji Tanigawa
2011
Pink Subaru
as Zen
2010
Ai wa mieru: Zenmô fûfu ni yadotta chiisana inochi
2010
Perfect Blue
2010
Osaka Love & Soul
2010
Ekeb of Dekye
as Kenzo Furuyama
2010
Azamijô no lullaby
2010
Ryōmaden
2010
HUNT - Tax Investigation Officer
as Shiro Kume
2010
Steel Frame
2010
Bungo Japanese Literature Cinema
as Muramatsu
2009
The Summit: A Chronicle Of Stones to Serenity
as Kinjiro Okano
2009
The Vulture
2009
MR.BRAIN
2007
Walking My Life
as Wakaizumi
2007
Sixteen
as Sawazaki
2007
Angels with Broken Wings
as Sugawara
2007
Galileo
as Hiroshi Kamimura
2006
Attention Please
as Makoto Watanabe
2005
Reincarnation
as Yamanaka Producer
2005
Ichigo Chips
as Sakai
2005
Emergency Room 24 Hours
as Manabu Hibiya（日比谷 学）
2005
Umanohone: The Legendary Sword
2005
Matrilineal Family
2004
No-Pants Girls: Movie Box-ing2
2004
Locomotive Teacher
2004
Antenna
as Shigenobu
2004
The Hidden Blade
2004
AIBOU: Tokyo Detective Duo
2003
Karaoke Terror
2002
Concent
as Yamagishi
2001
Platonic Sex
2001
Stake Out
as Tasuku Yoshioka
1999
Samurai Shodown 2
as Galford
1999
Samurai Spirits 2: Asura Zanmaden
as Galford