Mio Shirai Biography: Age, Husband, Net Worth, Height, Weight, Sister, Career, Children, Wrestling

Mio Shirai is a Japanese professional wrestling referee and former wrestler who first gained attention wrestling alongside her younger sister on the independent joshi circuit.

Early in her career she competed in a variety of promotions, becoming known for her tag team performances and in-ring versatility.

After stepping back from active competition due to injury, she transitioned into refereeing and occasional appearances in the ring, earning recognition for her continued influence and dedication to the sport.

Profile

• Full name: Mio Shirai
• Date of birth: February 14, 1988
• Age: 37 years old
• Gender: Female
• Place of birth: Kamakura, Kanagawa, Japan
• State of origin: Kanagawa Prefecture
• Nationality: Japanese
• Profession: Professional wrestling referee, former professional wrestler
• Height: 1.64 m (5 ft 4½ in)
• Weight: 54 kg (119 lb)
• Parents: N/A
• Siblings: Io Shirai (younger sister)
• Spouse: Tank Nagai
• Children: The couple are parents. Their first child was born June 18, 2017; later reporting and Mio’s public statements indicate she is a mother to multiple children.
• Relationship status: Married
• Ethnicity: Japanese
• Net worth: $3 million

Early Life and education

Mio Shirai is now 37 years old and was born on February 14, 1988 in Kamakura, Kanagawa, Japan.

Details about her education, parents, or early schooling are not publicly available.

She has a younger sister known as Io Shirai better known Iyo Sky.

She began her pro wrestling career in March 2007 with her sister Io, competing as freelancers in various Japanese promotions.

Personal Life

Mio Shirai is married to fellow wrestler Tank Nagai.

The couple’s wedding took place on October 16, 2015 and they announced the birth of their first child on June 18, 2017.

Later reporting and Mio’s own public profiles have described her as a mother to multiple children (she has been publicly referred to as a mother of three in Japanese media and her own social posts).

Career

Mio Shirai began her wrestling career on March 4, 2007, debuting alongside her sister Io under the banner of Team Makehen in independent promotions such as Ice Ribbon, JWP Joshi Puroresu, Pro Wrestling Wave, and Sendai Girls’ Pro Wrestling.

In 2009, the sisters also made appearances in All Japan Pro Wrestling, securing their first championship together as TLW World Young Women’s Tag Team Champions.

In June 2010, Mio joined the Triple Tails stable with her sister and Kana, later continuing as the tag team Triple Tails.S after Io’s departure.

In 2014, she signed a unique four-way contract with Ice Ribbon, Oz Academy, Pro Wrestling Wave, and Union Pro Wrestling and pursued booking opportunities as well as championship competition.

She won titles such as the Union FTE World Championship and participated in notable tournaments and matches across multiple promotions.

She retired from active wrestling due to neck injuries in September 2015 at age 27.

After retirement, she transitioned to a referee role and also served as a trainer for Ice Ribbon and appeared occasionally in matches through the early 2020s.

In 2024 she worked a larger number of matches (reported as about 15 matches across various promotions) while still signed to Ice Ribbon as a referee, and in late 2024/early 2025 coverage notes her becoming a freelancer again to concentrate more on wrestling.

Awards

She won the TLW World Young Women’s Tag Team Championship with Io Shirai and captured victory in Pro Wrestling Wave’s Captain’s Fall Six Person Tag Team Tournament in 2009 (with Io and Gami).

Additional title reigns include championships in Ice Ribbon, Oz Academy, and Pro Wrestling Wave.

Net worth

Mio Shirai’s current net worth estimation is in the range of $3 million, mostly accumulated during her active years as a pro wrestler.

Social Media

• Instagram: @kaguya.shirai
• X (Twitter): @MIOiceribbon