Hatsune Kaidan (Hatsune Staircase) is a Japanese noise‑pop collaboration between legendary Osaka noise group Hijokaidan and the virtual Vocaloid singer Hatsune Miku, reinvented through live performance by real‑world vocalist Shirahata Kamin in a full “Miku‑style” costume. The project is part of Hijokaidan’s long‑running “Kaidan” (Staircase) series, which pairs the band with diverse guest artists, from idols to other avant‑garde acts. Hatsune Kaidan marks the first time a Vocaloid has been formally integrated into this series, blending J‑pop idol imagery with the group’s abrasive, experimental sound.

On stage, Hatsune Kaidan mixes squeaky, anime‑tinged Vocaloid melodies with screeching feedback, pounding electronics, and Hijokaidan’s signature chaotic noise. The live show becomes a surreal pop‑carnival, where J‑pop hooks collide with wall‑of‑sound distortion, turning children’s‑song‑like motifs into something radically unhinged yet oddly catchy. During concerts, Shirahata Kamin appears in a full Hatsune Miku cosplay, effectively becoming the physical “avatar” of the Vocaloid while singing live alongside Hijokaidan’s electronics and noise textures. This visual‑theatrical twist turns the project into a meta‑commentary on idol culture and virtual performance, wrapped in a high‑volume, anarchic live act that fans describe as both playful and profoundly destructive.