Koshi Mizukami is a prominent Japanese actor widely recognized for his compelling performances in television dramas and feature films. Initially debuting under the stage name Kenshi Okada, he quickly captured public attention with his breakout role in the 2018 series Meet Me After School. Over the years, Mizukami has transitioned from a promising newcomer into a critically acclaimed leading man, earning multiple prestigious acting awards across Japan’s entertainment industry.
- Koshi Mizukami: Quick Facts & Bio Data
- Early Life, Education, and Baseball Background
- Career Breakthrough and Evolution
- Major Movies and TV Shows
- Television Dramas
- Films
- Awards and Recognition
- Personal Life, Wife, and Baby
- Net Worth and Financial Standing
- Frequently Asked Questions
- What is Koshi Mizukami’s real or birth name?
- How old is Koshi Mizukami?
- Who is Koshi Mizukami’s wife?
- Does Koshi Mizukami have children?
- What was Koshi Mizukami’s breakthrough acting role?
- What is Koshi Mizukami’s height and net worth?
Koshi Mizukami: Quick Facts & Bio Data
| Full Name | Koshi Mizukami (水上恒司) |
| Ex-Stage Name | Kenshi Okada (岡田健史) |
| Date of Birth | May 12, 1999 |
| Age | 27 years old |
| Place of Birth | Higashi Ward, Fukuoka, Japan |
| Nationality | Japanese |
| Ethnicity | Japanese |
| Height | 5 feet 10 inches (178 cm) |
| Religion | Shintoism |
| Parents | Mr. and Mrs. Mizukami |
| Marital Status | Married (February 2026) |
| Children | Expecting first child (announced 2026) |
| Profession | Actor, Model |
| Net Worth | $1 million USD |
| Official Instagram | @koshi_mizukami |
Early Life, Education, and Baseball Background
Born on May 12, 1999, in Higashi Ward, Fukuoka, Japan, Koshi Mizukami was raised by his parents, Mr. and Mrs. Mizukami. Growing up, he developed a deep passion for sports and began playing baseball in the second grade of elementary school. He continued his athletic pursuits as a catcher after entering Soseikan High School.
Although athletics defined much of his early life, Mizukami’s trajectory shifted during his third year of high school when he left the baseball club and joined his school’s drama club. This exposure sparked an intense interest in acting, steering him toward a professional career in the performing arts immediately following his graduation.
Career Breakthrough and Evolution
Koshi Mizukami entered professional acting in 2018 when he landed the role of Akira Kuroiwa in the TBS television drama Meet Me After School (Chugakusei Nikki). His natural screen presence and emotionally resonant performance opposite Kasumi Arimura earned him widespread acclaim, including the Newcomer Award at the 28th TV LIFE Drama Grand Prize.
Following his successful debut, Mizukami starred in a diverse range of television series, such as the police procedural MIU404 (2020), the NHK historical drama Reach Beyond the Blue Sky (2021), Blue Moment (2024), and the morning drama Boogie Woogie (2023-2024). In 2022, after a legal dispute and contract settlement with his former agency Spice Power, he officially began working under his real name, Koshi Mizukami.
His film career has run parallel to his television success, highlighted by standout performances in Lesson in Murder (2022), Out (2023), and his leading role in the wartime romance film Till We Meet Again on the Lily Hill (2023). His prominent casting choices extended into high-profile projects like Wind Breaker and Kowloon Generic Romance.
Major Movies and TV Shows
Television Dramas
- Meet Me After School (TBS, 2018) – Akira Kuroiwa
- MIU 404 (TBS, 2020) – Yohito Kokonoe
- Reach Beyond the Blue Sky (NHK, 2021) – Heikuro Odaka
- Date My Daughter (NTV, 2021) – Hikaru Irino
- Boogie Woogie (NHK, 2023-2024) – Toshikazu Aizawa
- Blue Moment (Fuji TV, 2024) – Yugo Sonobe
- Synanthrope (TV Tokyo, 2025) – Kennosuke Tonari
- Soul Mate (Netflix, 2026) – Arata Oikawa
Films
- Hope (2020) – Tadashi Ishikawa
- The Legacy of Dr. Death: Black File (2020) – Kei Sawada
- Lesson in Murder (2022) – Masaya Kakei
- Till We Meet Again On The Lily Hill (2023) – Akira Sakuma
- Out (2023) – Kaname Abe
- Wind Breaker (2025) – Haruka Sakura
- Kowloon Generic Romance (2025) – Hajime Kudo
Awards and Recognition
Koshi Mizukami’s dedication to his craft has been validated by numerous industry honors:
- 99th Television Drama Academy Awards (2019): Best Supporting Actor for Meet Me After School
- TV LIFE Annual Drama Awards: Newcomer Award
- Nikkansports Film Awards: Yūjirō Ishihara Newcomer Award
- Japan Academy Film Prize: Newcomer of the Year
- Japan Academy Film Prize: Outstanding Performance by an Actor in a Leading Role for Till We Meet Again on the Lily Hill
- Elan d’or Awards (2025): Newcomer Award for Blue Moment
Personal Life, Wife, and Baby
On February 28, 2026, Koshi Mizukami announced a major personal milestone to his fans: he had married a woman from outside the entertainment industry. He also revealed that the couple was expecting their first child together. Out of respect for his partner’s privacy, her name and personal details have been kept out of the public eye. Prior to his marriage, Mizukami maintained a relatively private personal life without high-profile public relationships.
Net Worth and Financial Standing
As of 2026, Koshi Mizukami holds an estimated net worth of $1 million USD. His primary source of income stems from his extensive acting career in television dramas, feature films, and streaming platform productions. Additional revenue is generated through brand endorsements, commercial advertising campaigns, and modeling projects.
Frequently Asked Questions
What is Koshi Mizukami’s real or birth name?
His birth name is Koshi Mizukami. Early in his career, he performed under the stage name Kenshi Okada before officially reverting to his real name in August 2022.
How old is Koshi Mizukami?
Born on May 12, 1999, Koshi Mizukami is 27 years old.
Who is Koshi Mizukami’s wife?
He is married to a non-celebrity woman whose identity has not been publicly disclosed to protect her privacy. The couple married in February 2026.
Does Koshi Mizukami have children?
Yes, upon announcing his marriage in February 2026, he also shared that he and his wife were expecting their first child.
What was Koshi Mizukami’s breakthrough acting role?
His major breakthrough came in 2018 when he played the role of Akira Kuroiwa in the TBS drama series Meet Me After School.
What is Koshi Mizukami’s height and net worth?
He stands at 5 feet 10 inches (178 cm) tall, and his estimated net worth is $1 million USD.
