Phantom Siita is a “retro-horror” Japanese idol girl group formed in 2024. They are produced by Ado. Phantom Siita were formed on June 25, 2024. They released their debut digital single “Otomodachi” the next day. From July to October, they performed as the opening act of Ado’s “Mona Lisa’s Profile” Tour. Their second digital single, “Just Wanna XXXX with You”, was released on July 31. On August 28, they released their third digital single, “Devilish Girl”. Their fourth digital single, “Hanabami”, was released on September 27. In October, they released their fifth digital single “Conflicting” on October 10, and their sixth digital single “Zoku Zoku” on October 25. Their debut album, Girlhood Memories, was released on October 30. On November 1, they held their first concert at the Nippon Budokan.
The concept of Phantom Siita is “retro horror idol” and they aim to create a new idol image while giving a sense of nostalgia and Japaneseness. The group’s name is a combination of the word “Phantom”, which are illusions and ghosts, and “Siita”, which is a combination of the scientific name of the butterfly, Parantica sita, and the scientific name of the moth, Epicopeia hainesii, which is known for mimicking swallowtail butterflies. “If modern idols are “butterflies”, then Phantom Siita is a “moth”, a heretical existence in the idol industry. It’s frightening and beautiful, making you want to reach out even though you know it’s scary. It’s filled with the hope that she will become an idol worthy of the word “idol.” New for some, nostalgic for others. The real Japanese idols are here.”
From January to February 2025, they embarked on their first world tour called Phantom Siita – 1st World Tour “Moth to a Flame”. In April 2025, the group signed with Universal Music Japan label Virgin Music. On May 17, Hisui left the group due to health reasons. They released the single “Love, Hate” on July 9. From July to August, they embarked on their first tour of Japan called Phantom Siita – 1st Japan Tour “Flame Medusa”. Their seventh digital single, “Noah”, was released on August 25, followed by their eighth digital single, “Bot Bakka”, on November 11. On January 30, 2026, they will release their ninth digital single “Rose-Colored Moon”. They will embark on a Zepp tour across Japan from July to August 2026 called Phantom Siita Zepp Tour 2026 “Phantom Land”.
