Utsunomiya Shion began her career in the entertainment industry under the alias Anzai Rara. As Anzai Rara, she released several singles and albums, primarily targeting a younger audience. Her early work showcased her youthful and energetic persona, which would later become a hallmark of her career. During this period, she also made appearances in various television programs and radio shows, gaining experience and building her fanbase.
Her work with remains a benchmark. For new fans discovering the history of the genre, RION is often one of the first names that appears—a testament to the enduring quality of her performances and the sheer force of her presence. She proved that an actress could control her narrative, reinvent her brand, and leave behind a body of work that continues to define the "platinum" tier of the industry.