Onephony, a Japanese girl idol group, was formed in 2022 under the production of Fukase Miou. The group debuted with five members who were introduced on December 18, 2022, at the Nakano Zero Small Hall. In February 2023, Onephony added a sixth member, but by September 2025, the group returned to a five-member lineup following a graduation. The members are Kubota Sayaka, Tachibana Ayane, Yumeno Mio, Asakura Mirai and Tajima Sakurako. Their debut single "Going My Way" was released on June 18, 2023, followed by tracks like "SugarDoll" on August 21, 2023, and "Crisis Code" on March 1, 2024. Onephony's first EP, Fanfare, was released on November 19, 2025. The group has performed at notable events such as the TOKYO IDOL FESTIVAL in 2023, 2024, and 2025, and has undertaken several tours, including their three-city tour in 2024 and a nationwide tour in 2025.
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