Kanichiro official photo - Japanese Humanite actor, star of The Boy and I Who Will Break Up in 100 Days

Kanichiro

BIOGRAPHY

Kanichiro (Japanese: 寛一郎; born August 16, 1996) is a Japanese actor signed to Humanite. He plays Itsuki Hasegawa opposite Kentaro Ito’s Yuma Kasuga in the 2026 MBS boys’ love drama The Boy and I Who Will Break Up in 100 Days, based on the novel by the late Asahara Naoto.

Born in Setagaya, Tokyo, he comes from an acting family: his father is actor Koichi Sato and his grandfather was the late actor Rentaro Mikuni. He decided to pursue acting at eighteen and, after finishing high school, spent a short period studying in Los Angeles before returning to Japan to begin his career.

He made his screen debut in the film Kiku to Girochin (Chrysanthemum and Guillotine), shot in 2016 and released in 2018, and formally entered the industry in 2017. His performances have been recognized with the Best New Actor prize at the 33rd Takasaki Film Festival, Newcomer Actor honors at the 27th Japan Movie Critics Awards and the 92nd Kinema Junpo Best Ten, and the Supporting Actor prize at the 28th Japan Movie Critics Awards. His other credits include the films Kokoro ga Sakebitagatterunda and Namiya Zakkaten no Kiseki, and the television drama Grand Maison Tokyo.

Kanichiro works under his given name alone, though his legal name is Kanichiro Sato.

He plays Itsuki Hasegawa in The Boy and I Who Will Break Up in 100 Days, and the single name on the credit is the one he has used since his 2017 start.

His first film, Kiku to Girochin, was shot in 2016 and released in 2018, so the prizes from the Takasaki Film Festival, the Japan Movie Critics Awards and Kinema Junpo all followed within a few years of his entry into the industry.

The two Japan Movie Critics Awards on his list fall in consecutive editions, the 27th and the 28th, and they sit in different categories: Newcomer Actor first, Supporting Actor one edition later. That is a quick change of category for the same body of work to be measured in. His credits also move across formats, from feature films such as Kokoro ga Sakebitagatterunda and Namiya Zakkaten no Kiseki to the television drama Grand Maison Tokyo, and then to a boys’ love series broadcast on MBS. The family background of Koichi Sato and Rentaro Mikuni runs through film and stage acting, and his own route began in cinema before it reached a weekly drama slot.

In my view, his list reads like a young actor choosing films over easy visibility. Kiku to Girochin was a demanding first role, playing the anarchist Daijiro Furuta, and within a few years he was in Takeshi Kitano’s Kubi as Mori Ranmaru. I would start with Kiku to Girochin, then move to Gekijo to see how his screen presence settles.

I find it telling that an actor from such a well known acting family works on screen under the single name Kanichiro. That is my reading as an editor, a viewpoint and not a statement about his reasons.

PROFILE DETAILS

Native Name
寛一郎
Real Name
Kanichiro Sato (佐藤寛一郎)
Nickname
Kanichiro (寛一郎), performs mononymously
Pronouns
he/him
Born
(Age 30)
Birthplace
Setagaya, Tokyo, Japan
Gender
Male
Western Zodiac
Leo ♌
Chinese Zodiac
Rat 🐭
Height
182 cm (5'11.5")
Profession
Nationality
Debut
2017 · Kiku to Girochin (Chrysanthemum and Guillotine), filmed 2016, released 2018; formally began his acting career in 2017
Agency / Label
Humanite (ユマニテ)
Years Active
2017-present

FUN FACTS

  • In 2019 he took leading parts in Kimi ga Mata Hashiridasu Toki and in the two Gesunin films.
  • He appeared in Gekijo and AWAKE in 2020, and in Migawari Chushingura and Namibia no Sabaku in 2024.
  • His Grand Maison Tokyo part, Kohei Serita, returned in the 2024 film Grand Maison Paris.
  • Two 2018 television dramas, Doro Kei and Legal V, are among his early small screen credits.

NOTABLE AWARDS

  • 27th Japan Movie Critics Awards, Newcomer Actor.
  • 92nd Kinema Junpo Best Ten, Newcomer Actor.
  • 33rd Takasaki Film Festival, Best New Actor.
  • 28th Japan Movie Critics Awards, Supporting Actor.

CAREER AT A GLANCE

Kanichiro holds one record across the site: one leading role.

It dates from 2026.

FREQUENTLY ASKED QUESTIONS

Who is Kanichiro?

Kanichiro is a Japanese actor born on August 16, 1996 in Setagaya, Tokyo. He is signed to Humanite and is the son of actor Koichi Sato and the grandson of the late actor Rentaro Mikuni.

Who does Kanichiro play in The Boy and I Who Will Break Up in 100 Days?

He plays Itsuki Hasegawa, one half of a gay couple who go viral online and agree to film a 100-day documentary about their relationship, even though they have secretly already broken up.

How tall is Kanichiro?

He is 182 cm (5’11.5″).

What was Kanichiro's first role?

His screen debut was the film Kiku to Girochin (Chrysanthemum and Guillotine), shot in 2016 and released in 2018; he formally began his acting career in 2017.

What awards has Kanichiro won?

He has received the Newcomer Actor prize at the 27th Japan Movie Critics Awards and the 92nd Kinema Junpo Best Ten, Best New Actor at the 33rd Takasaki Film Festival, and the Supporting Actor prize at the 28th Japan Movie Critics Awards.

Which television drama has Kanichiro appeared in besides The Boy and I Who Will Break Up in 100 Days?

Grand Maison Tokyo is among his television credits. His other listed credits are the films Kokoro ga Sakebitagatterunda and Namiya Zakkaten no Kiseki.

Who is Kanichiro's grandfather?

His grandfather was the late actor Rentaro Mikuni, and his father is actor Koichi Sato.

What was Kanichiro's first television role?

Midnight Journal, in March 2018.

Has Kanichiro been in an NHK morning serial?

Yes. He joined the cast of Bakebake in 2025 as Ginjiro Yamane.

What was Kanichiro's role in Kiku to Girochin?

He played the anarchist Daijiro Furuta in his first film, which was shot in 2016 and reached audiences in 2018.

Is Kanichiro in a Takeshi Kitano film?

Yes. He plays Mori Ranmaru in Kubi.

Which films did Kanichiro make in 2019 and 2020?

In 2019 he took leading parts in Kimi ga Mata Hashiridasu Toki and in the two Gesunin films. The following year brought Gekijo and AWAKE.

What is Kanichiro's legal name?

Kanichiro Sato. On screen he works under the single name Kanichiro.

What did Kanichiro do in 2024?

He appeared in Migawari Chushingura and Namibia no Sabaku, and his Grand Maison Tokyo character Kohei Serita returned in the film Grand Maison Paris.

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