Banzai Japan was formed in 2014 as a Japanese idol unit aiming to unite all forty‑seven prefectures; the group comprises members such as Fumi Fujisaki, Sasa Sasagawa, Shiori Fujisaki, Maika Ando, Yūki Mochimaru, Kana Ichinose, Rino Ibusuki, Riko Ueno, Aira Tsukumo, Yū Kōsaka, and Arice Hoshino. The group made its major label debut in June 2019 with the single "十人十色" / "金魚の歌" released through Rock Fields' sub‑label Victoria Beats, marking its first chart entry. In March 2020 "Jumpin'! Nappu! Japan!" followed, further establishing the group’s presence in the idol scene. January 2021 saw the release of the single "Banzai Fighter / Engi ga Ii Machi / Yell Delivery", which received positive reception for its energetic choreography. The group continued its momentum with "Afrodynamite / Otomegokoro" in February 2022, and "Cheer Dance Time / Let Me Cryyyyyyyyyyy / Hibana, Odoriuta" in February 2023, both of which expanded the group’s fanbase across Japan. In June 2024 the single "Nippon Isshū Ai no Gohan Tabi / Banzai! Banzai! / Curtain Call" was released, achieving a top‑ten position on the Oricon singles chart.