Hiro Mizushima Biography: Books, Net Worth, Age, Height, Movies, Instagram, Parents, Ethnicity, Wife

Tomohiro Saitō, professionally known as Hiro Mizushima, is a prominent Japanese actor, creative director, novelist, and entrepreneur.

He rose to fame through his charismatic roles in tokusatsu series like Kamen Rider Kabuto and popular dramas such as Zettai Kareshi and Mei-chan no Shitsuji, later expanding into films including the live-action Black Butler.

Known for his handsome looks, versatile performances, and transition to writing and business ventures, he has maintained a respected presence in Japanese entertainment while balancing family life.

Quick Facts

• Full Name: Tomohiro Saitō
• Stage Name: Hiro Mizushima
• Born: April 13, 1984
• Age: 41 years old
• Birthplace: Tokyo, Japan
• Nationality: Japanese
• Occupation: Actor, Creative Director, Novelist, Entrepreneur
• Height: 1.8 m
• Parents: Mr. and Mrs. Saitō
• Siblings: 1
• Spouse: Ayaka (m. 2009)
• Children: 2
• Relationship: Married
• Net Worth: $2 million

Early Life and Education

Tomohiro Saitō was born on April 13, 1984, in Tokyo, Japan, to Mr. and Mrs. Saitō. He spent his early childhood in Zurich, Switzerland, attending an international school there until elementary graduation, which helped him become fluent in English. He has one older sister.

He returned to Japan for middle and high school before attending Keio University, where he earned a bachelor’s degree in Environmental Information (or Integrated Policy/Environmental Informatics). His ethnicity is Japanese, and his religion is not publicly known.

Career

Hiro Mizushima began his career after graduating from university, entering the entertainment industry through a model friend who introduced him to the agency Ken-On.

He debuted in 2005 with a role in the drama Gokusen 2 and quickly gained attention in tokusatsu with his lead performance as Souji Tendou in Kamen Rider Kabuto (2006-2007), followed by the film spin-off Kamen Rider Kabuto: God Speed Love.

Early supporting roles in dramas helped build his recognition as a promising young talent with strong screen presence.

He achieved greater prominence in the late 2000s with leading roles in high-profile series like Zettai Kareshi (2008) as Soshi Asamoto, Mei-chan no Shitsuji (2009) as Rihito Shibata, and Tokyo DOGS (2009).

These successes led to film opportunities such as Drop (2009) and Beck (2010), and he took on the iconic role of Sebastian Michaelis in the 2014 live-action Black Butler.

In 2010, he left his original agency to establish his own, A stAtion, while launching a writing career under his real name—his debut novel Kagerou won a major prize—and diversifying into creative direction and business.

Hiro Mizushima has built a multifaceted legacy in Japanese entertainment, respected for his acting range across genres, successful shift to authorship and entrepreneurship, and influence as an angel investor.

His work continues through occasional projects, YouTube content, and family-focused endeavors that reflect his balanced approach to public and private life.

Social Media

• Instagram Handle: @hiro_mizushima_official
• Facebook Handle: Unknown
• Twitter Handle: @HiroMizushimav2

Personal Life

Hiro Mizushima has been married to singer Ayaka since February 22, 2009. The couple has two daughters, born in June 2015 and October 2019.

He keeps his family life relatively private but often shares warm glimpses of fatherhood on social media, emphasizing his role as a dedicated dad alongside his professional pursuits.

His background as a returnee from Switzerland and fluency in English add to his global outlook.

Net Worth

Hiro Mizushima has an estimated net worth of around $2 million. His primary sources of income include earnings from acting in dramas, films, and tokusatsu projects, along with revenue from his creative direction, novel publications, angel investing, YouTube activities, and business ventures through his agency A stAtion.

Filmography

• Kamen Rider Kabuto (2006-2007) – Souji Tendou / Kamen Rider Kabuto
• Kamen Rider Kabuto: God Speed Love (2006) – Souji Tendou / Kamen Rider Kabuto
• Zettai Kareshi (2008) – Soshi Asamoto
• Mei-chan no Shitsuji (2009) – Rihito Shibata
• Tokyo DOGS (2009) – Maruo Kudo
• Drop (2009) – Tatsuya Iguchi
• Beck (2010) – Ryusuke Minami
• Black Butler (2014) – Sebastian Michaelis
• Various other dramas including Gokusen 2 (2005), Mr. Brain (2009)