Junior Idol: Rei Kuromiya

: The term specifically applies to models under the age of 15, frequently spanning elementary and junior high school ages.

, went viral, accumulating millions of views in just days and leading to international tours in the U.S. and UK.

The group’s debut single became a global viral sensation. Rei’s youthful, melodic vocals provided the perfect "kawaii" counterpoint to the heavy metal screams and growls.

However, her time with LADYBABY came to an abrupt end. On November 17, 2017, Kuromiya officially left the group, citing profound disillusionment with the rigid demands of mainstream idol culture and ongoing throat issues exacerbated by heavy touring, as detailed on Wikipedia . Musical Transition: BRATS and REIRIE junior idol rei kuromiya

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: Beyond music, she has become a significant figure in Tokyo's alternative fashion circles, frequently collaborating with brands that align with her punk-inspired, "subculture" aesthetic. Legacy and Current Status

Following her exit from the idol sphere, Kuromiya poured her entire focus back into . Free from the constraints of idol contracts, the band signed with major labels like Avex and adopted a much darker, heavier grunge sound. : The term specifically applies to models under

Despite the group's runaway success, Kuromiya grew increasingly uncomfortable with the manufactured, novelty nature of the project. In late 2017, citing throat issues and a desire to pursue authentic rock music, she officially left LADYBABY. Her departure marked a definitive line in the sand: she was officially done playing the role of a pop commodity. Reclaiming Autonomy: The Modern Era

In 2015, Kuromiya achieved global mainstream attention when she co-founded the "Death Pop" group alongside Rie Kaneko and Australian cross-dressing wrestler Ladybeard.

Rei continues to be active in the music industry, steering her career on her own terms. A significant reunion took place in 2023 when she launched the duo unit with her former LADYBABY co-member, Rie Kaneko. The name combines both of their first names (" REI " and " RIE "). As of 2026, Rei remains an active performer, with concert tours in Japan and ongoing musical releases. The group’s debut single became a global viral sensation

The band played aggressive punk and alternative rock, a harsh contrast to J-pop.

She released dozens of solo image DVDs and photobooks before even reaching high school.

In a major milestone, REIRIE is set to make their major-label debut in 2026. On , they will release their first EP, "Amethyst," under Bandai Namco Music Live's MoooD Records. The lead single from the EP, "AISHITEYO," is an emotional rock song that showcases their powerful vocal and thematic depth.

Her professional activity is documented as starting as early as 2008, when she was still a young child.