Seishirou Katou

Seishirou Katou

Seishirou Katou is a Japanese child actor. He debuted when he was 13 months old.

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Known For

Happy Feet

Happy Feet

2006 • as Baby Mumble (voice)

Cells at Work!

Cells at Work!

2024 • as Arata Takeda

Dragon Sakura

Dragon Sakura

2005 • as Kouichirou Amano

The Greatest Teacher

The Greatest Teacher

2023 • as Sagara Rui

Assassination Classroom

Assassination Classroom

2015 • as Itona

Fujiko F. Fujio Sci-Fi Short Drama

Fujiko F. Fujio Sci-Fi Short Drama

2023

Filmography

2026

Death Note: The Musical
Death Note: The Musical
as Light Yagami
Movie - Released: 2/19/2026
Suikoden
Suikoden
as Gen Shogo
TV - Released: 2/15/2026
Before the Day
Before the Day
as Kotaro Sakabe
TV - Released: 4/2/2026

2025

Hoso Kyoku Senkyo
Hoso Kyoku Senkyo
as Hiroshi Ibuki
TV - Released: 7/12/2025

2024

Cells at Work!
Cells at Work!
as Arata Takeda
Movie - Released: 12/13/2024
舞台「未来少年コナン」
舞台「未来少年コナン」
as コナン
Movie - Released: 5/28/2024

2023

Lawyer Sodom
Lawyer Sodom
as Kai Yakumo
TV - Released: 4/28/2023
The Greatest Teacher
The Greatest Teacher
as Sagara Rui
TV - Released: 7/15/2023
Fujiko F. Fujio Sci-Fi Short Drama
Fujiko F. Fujio Sci-Fi Short Drama
TV - Released: 4/9/2023

2022

ミュージカル「るろうに剣心　京都編」
ミュージカル「るろうに剣心　京都編」
Movie - Released: 5/17/2022
I Fell in Love with Your Footsteps
I Fell in Love with Your Footsteps
Movie - Released: 3/23/2022
Guardian of the Market
Guardian of the Market
as Kosuke Rokkaku
TV - Released: 7/11/2022
Isn't It a Bad Guy?
Isn't It a Bad Guy?
as Sosuke Nakano
TV - Released: 2/3/2022

2021

The Sun Stands Still
The Sun Stands Still
as Yuji Yanagi
Movie - Released: 3/5/2021
MOCOMI
MOCOMI
TV - Released: 1/23/2021

2020

#HandballStrive
#HandballStrive
as Masao Kiyota
Movie - Released: 7/24/2020

2019

Twilight
Twilight
as Yuusuke Kijinami (voice)
Movie - Released: 6/21/2019

2016

Assassination Classroom: Graduation
Assassination Classroom: Graduation
as Itona Horibe
Movie - Released: 3/25/2016
Bōkyō
Bōkyō
as (segment "Umi no hoshi")
Movie - Released: 9/28/2016
KUHANA!
KUHANA!
Movie - Released: 10/8/2016
Moribito: Guardian of the Spirit
Moribito: Guardian of the Spirit
as Toya
TV - Released: 3/19/2016
OUR HOUSE
OUR HOUSE
TV - Released: 4/17/2016

2015

Assassination Classroom
Assassination Classroom
as Itona
Movie - Released: 3/21/2015

2014

A Far Promise
A Far Promise
Movie - Released: 8/25/2014

2013

Ninja Kids!!! Summer Mission Impossible
Ninja Kids!!! Summer Mission Impossible
as Nintaro
Movie - Released: 7/6/2013

2012

再会
再会
Movie - Released: 12/8/2012
For Love's Sake
For Love's Sake
as Makoto Taiga
Movie - Released: 6/16/2012

2011

Ninja Kids!!!
Ninja Kids!!!
as Rantaro
Movie - Released: 7/23/2011
Friends: Naki on Monster Island
Friends: Naki on Monster Island
as Young Naki (voice)
Movie - Released: 12/17/2011
Odd Family 11
Odd Family 11
as Saigo Sanada
TV - Released: 10/21/2011

2010

Sakurada Gate Incident
Sakurada Gate Incident
Movie - Released: 10/16/2010
Heart and Yummie
Heart and Yummie
as Umasou (voice)
Movie - Released: 10/16/2010
Zatoichi: The Last
Zatoichi: The Last
as Goro
Movie - Released: 5/29/2010
Goodbye Alma
Goodbye Alma
as Kenta Kawakami
TV - Released: 12/13/2010
The History of Our Family
The History of Our Family
as Minoru Yame
TV - Released: 4/9/2010
The Wallflower
The Wallflower
as Nakahara Takeru
TV - Released: 1/15/2010
Tatsuya Miyanishi Theatre: Heart and Yummie
Tatsuya Miyanishi Theatre: Heart and Yummie
TV - Released: 10/4/2010

2008

Tales of Terror: Gi
Tales of Terror: Gi
Movie - Released: 7/6/2008

2006

Happy Feet
Happy Feet
as Baby Mumble (voice)
Movie - Released: 11/16/2006

2005

Shining Boy and Little Randy
Shining Boy and Little Randy
as Takao Ogawa
Movie - Released: 9/23/2005
Dragon Sakura
Dragon Sakura
as Kouichirou Amano
TV - Released: 7/8/2005

Unknown

TV
Honto ni Atta Kowai Hanashi 2009 10th Anniversary
as {Segment 1} The Boy
TV