Yui Mizuno

Yui Mizuno is a Japanese former singer and dancer, widely known by her stage name Yuimetal. She gained significant recognition as a key member of the globally recognized kawaii metal group Babymetal, and also contributed to the idol group Sakura Gakuin. Her presence was marked by an energetic dance style and a distinct visual appeal that helped define Babymetal’s unique blend of J-pop and heavy metal. Fans remember her for the powerful collective dynamic she helped create on stage, performing intricate choreography alongside her bandmates.

After stepping away from Babymetal in 2018 due to health considerations, Mizuno maintained a private profile while remaining affiliated with her talent agency, Amuse Inc. As of 2026, she has transitioned out of the entertainment industry entirely. Her agency confirmed in 2025 that she is now pursuing new paths outside of public life, dedicating herself to personal interests away from the spotlight.[edit]

Yui Mizuno began her journey into the performing arts at a young age, displaying an early interest in dance and singing. She was born on June 20, 1999, in Japan's Kanagawa Prefecture. Her formal training started in 2008 when she enrolled at the Actors Studio Hiroshima, a school known for nurturing young talent. This period allowed her to develop foundational skills in performance, setting the stage for her future career in music.

During her early years, Mizuno also explored acting, appearing in the 2008 stage play The Little Match Girl. She even featured in a commercial for the clothing brand "Earth Music & Ecology" in 2010, showcasing her comfort in front of the camera before her major musical debut. A significant step in her pre-fame career came in 2010 when she became a founding member of the Japanese idol girl group Sakura Gakuin. This group, themed around a school concept, provided a platform for young performers to develop their skills across various genres.

Within Sakura Gakuin, Mizuno joined several sub-units, each with a distinct focus. She was part of the "Baguette" sub-unit, for instance, and most notably, the heavy metal-inspired "Heavy Music Club." This particular sub-unit was conceived as a creative experiment, blending idol aesthetics with hard rock sounds. It featured Mizuno alongside Suzuka Nakamoto and Moa Kikuchi, and its unique concept quickly garnered attention. The "Heavy Music Club" would prove instrumental, as its distinct style and members eventually evolved into Babymetal, the group that would bring her international recognition.[edit]

Mizuno's career took a significant turn in 2010 when she became a founding member of Sakura Gakuin, an idol group managed by Amuse Inc. It was within this group that the "Heavy Music Club" sub-unit was formed, bringing together Mizuno, Suzuka Nakamoto, and Moa Kikuchi. This sub-unit quickly evolved into Babymetal, officially debuting as a separate entity in 2012 with their single "Doki Doki ☆ Morning."

The group's breakthrough came with the release of their self-titled debut album in 2014. This album reached number 13 on Japan's Oricon album chart, introducing their unique blend of "kawaii metal" to a wider audience. As Yuimetal, Mizuno was one of the three core members, known for her energetic performances and contributions to the group's distinct visual style and choreography. Babymetal gained substantial international attention, particularly with their second album, Metal Resistance, released in 2016. This album climbed to number 2 on the Oricon charts and reached number 38 on the UK Albums Chart, highlighting their growing global reach. A major milestone for the group was their performance at the prestigious Glastonbury Festival in the UK in 2016, an uncommon achievement for a Japanese act at the time.

Beginning in August 2017, Mizuno was absent from Babymetal's performances due to undisclosed health issues. After a period of hiatus, she officially departed from Babymetal in October 2018. While she remained under contract with Amuse Inc. for several more years, her public activities ceased. In 2025, Amuse Inc. announced that Mizuno had left the agency entirely, indicating her decision to pursue opportunities outside the entertainment industry and live a private life.[edit]

As Yuimetal, Yui Mizuno cultivated a public image that was integral to Babymetal's "kawaii metal" aesthetic. This style cleverly merged the innocent, cheerful sensibilities of Japanese idol culture with the aggressive sounds and visual cues of heavy metal. Her signature look often featured school-uniform-inspired outfits, complete with plaid skirts, knee-high socks, and elaborate hairstyles, all while performing intense, synchronized choreography. Fans connected with her vibrant energy and the distinct balance she struck between cuteness and powerful stage presence.

The Babymetal fandom, often referred to as "The One" or "Metalheads," embraced the unique blend of genres and the playful yet professional demeanor of the members. Mizuno's social media presence was largely managed through the group's official channels during her active years, maintaining a cohesive brand image. Her performances were characterized by a sense of youthful exuberance that resonated deeply with audiences, contributing significantly to the group's global appeal.[edit]

Yui Mizuno is currently evaluated by the iFANN Global Fame Engine but holds no placement in the published rankings. While her active tenure concluded years ago, her legacy remains anchored in the global phenomenon of Babymetal, a group that redefined the intersection of idol culture and heavy metal. The fanbase surrounding her work does not possess a distinct official name separate from the broader community; supporters collectively identify as "Babys" or fans of the group rather than using specific terminology for Mizuno alone. This disciplined audience is renowned for synchronized headbanging rituals, coordinated light stick usage, and the creation of massive human pyramids at live events. Notable campaigns have included global streaming pushes to secure chart positions for releases like Metal Resistance and birthday billboard projects in Tokyo and New York City. Following her departure in October 2018, the collective grief transformed into a supportive movement where fans shared memories and analyzed her contributions without engaging in harassment. A popular narrative among these followers is the idea that Mizuno's contribution was foundational yet transient, symbolized by the recurring theme "Once a Babymetal, always a part of the story." Despite rumors circulating on platforms like Reddit regarding her pursuing higher education or a private life, the fandom largely respects her privacy, treating her as a legendary former member whose story serves as a defining chapter in the band's history.[edit]

Yui Mizuno's stage name, Yuimetal, was a playful combination of her given name, Yui, and the "metal" genre associated with Babymetal. She was known for her enthusiastic and often charming stage presence, which balanced the intensity of metal music with idol cuteness. Before joining Sakura Gakuin, Mizuno appeared in a commercial for the clothing brand "Earth Music & Ecology" in 2010, sharing the screen with other future members of the idol group. A fun fact about her personal interests is that she was a big fan of the classic Japanese anime series Chibi Maruko-chan. Beyond these established facts, her lore is defined by the dramatic circumstances of her exit from the group. On October 19, 2018, the band officially announced her permanent departure after nearly a year away from the stage due to physical issues, marking the moment the original trio dissolved. Fans often retell the story of her journey from joining Sakura Gakuin at age 11 to becoming a core member before departing at age 19, cementing her status as the founding figure who helped establish the "Kawaii Metal" genre. Since leaving in 2018, her silence has fueled various theories among fans, including speculation about her attending college, though none have been officially confirmed, adding a layer of mystery to her retired status.[edit]

Yui Mizuno was born on June 20, 1999, in Kanagawa Prefecture, Japan. Details about her immediate family, including her parents and any siblings, have been kept private throughout her career. Her early enrollment in performing arts schools suggests a supportive family environment that encouraged her artistic development from a young age. Since her departure from the entertainment industry, Mizuno has maintained a very low public profile, further ensuring the privacy of her family and personal life.[edit]

Yui Mizuno worked closely with her fellow Babymetal members, Suzuka Nakamoto (Suzy) and Moa Kikuchi (Moametal), both of whom were also part of Sakura Gakuin. Their collective dynamic was central to Babymetal's stage presence and appeal. Key Kobayashi, known as Koba-Metal, served as the producer and songwriter for Babymetal, guiding the group's musical direction and creative vision throughout Mizuno's tenure.[edit]

Yui Mizuno has maintained a remarkably private personal life throughout and after her career in the entertainment industry. There are no public records or credible reports of any romantic relationships, engagements, or marriages involving her. Her public persona, especially during her time as Yuimetal in Babymetal, was consistently focused on her professional commitments and performances, with a clear emphasis on keeping her private life separate from her public image. As of 2026, Yui Mizuno is reportedly single, having transitioned away from the public spotlight to pursue a life outside of entertainment.[edit]

Estimating Yui Mizuno's net worth in 2026 presents a challenge due to her departure from the entertainment industry and the highly private nature of her finances since stepping away from the public eye. Her primary income streams during her active career came from her work with Babymetal and Sakura Gakuin. These included earnings from album sales, merchandise, international tours, and various performance fees. As a core member of Babymetal, she would have received a share of the group's significant global revenue, which included successful albums like Metal Resistance and major festival appearances. After leaving Babymetal in 2018, Mizuno remained under contract with Amuse Inc. until 2025. During this period, it is likely she received some form of retainer or compensation, even without active public projects. However, without any known solo ventures or public businesses, her financial growth since 2018 would have been limited to passive income from past work or private investments. Per iFANN's editorial analysis, a conservative estimate for her accumulated wealth as of 2026 sits at $1 Million, reflecting her earnings during her prominent years with Babymetal before her transition to a private life.[edit]