ゲテモノ

Vocaloid metal is a fusion of heavy metal and the Japanese vocal-synth scene, built around voicebanks such as Hatsune Miku, Megurine Luka, GUMI, IA, and Yuzuki Yukari. Producers program lead vocals using Vocaloid (or related vocal-synths/UTAU), then arrange them over guitars, bass, and metal drumming ranging from power-metal gallops to metalcore breakdowns. The style mirrors the broad spectrum of metal: from melodic power and symphonic strains to djent and metalcore aggression. Because the lead voice is synthetic, precise micro-edits to pitch, timbre, vibrato, phonemes, and dynamics are possible, enabling acrobatic melodies at extreme tempos, theatrical character songs, and even approximations of screams via sound design. Emerging from the Nico Nico Douga and dōjin circles, Vocaloid metal flourished online, where producers, illustrators, and fan communities co-create songs, PVs, and concept albums. Its sound sits at the crossroads of otaku culture, internet-native production, and modern Japanese metal.

Rock is a broad family of popular music centered on amplified instruments, a strong backbeat, and song forms that foreground riffs, choruses, and anthemic hooks. Emerging from mid‑20th‑century American styles like rhythm & blues, country, and gospel-inflected rock and roll, rock quickly expanded in scope—absorbing folk, blues, and psychedelic ideas—while shaping global youth culture. Core sonic markers include electric guitar (often overdriven), electric bass, drum kit emphasizing beats 2 and 4, and emotive lead vocals. Rock songs commonly use verse–chorus structures, blues-derived harmony, and memorable melodic motifs, ranging from intimate ballads to high‑energy, stadium‑sized performances.