Mari Iijima

Vaporwave is an internet-born microgenre and visual aesthetic that repurposes late‑20th‑century commercial sound—mu zak, smooth jazz, soft rock, synth‑pop, city pop, and corporate training tapes—into hazy, slowed, and looped collages. Its sound foregrounds pitched‑down samples, heavy reverb, tape hiss, vinyl crackle, and dreamy pads to evoke a mood between satire and sincere nostalgia. Beyond music, vaporwave is inseparable from its graphic language: Greco‑Roman busts, Japanese text, retro operating systems, chrome logos, palm trees, neon gradients, and “mall culture” architecture. The result feels like a haunted shopping mall: part critique of consumer capitalism, part wistful memory of media and retail spaces from the 1980s–2000s. Tempos are typically slow (roughly 60–90 BPM), harmonies tend toward lush seventh and extended chords, and rhythms range from barely perceptible loops to minimal, gated drum programming. Many tracks are short, vignette‑like studies in texture and mood.

Jirai kei is a recent Japanese internet-born pop micro‑genre and aesthetic that blends cute, sugary sounds with darker, obsessive and self‑destructive themes. The term comes from a fashion/aesthetic scene associated with yamikawaii and menhera culture, and in music it describes songs that sound soft and adorable on the surface but conceal lyrics about toxic love, dependency, jealousy, and emotional volatility. Sonically, jirai kei draws from J‑pop and Vocaloid traditions (denpa/picopop brightness, catchy hooks) while adopting modern hyperpop gloss, trap/EDM percussion, and highly edited, youthful vocals. The contrast between childlike, pastel timbres and intense, confessional writing is central to the style, making it both immediately hooky and emotionally sharp—an audio embodiment of “cute but dangerous.”

Future funk is an internet-born dance microgenre that fuses the sample-heavy ethos of vaporwave with the upbeat grooves of disco, funk, and Japanese city pop. Producers typically chop and pitch up catchy hooks from late-1970s and 1980s records, loop them over four-on-the-floor drums, and apply filter sweeps and sidechain compression in the spirit of French house. The result is a sparkling, high-energy sound that feels both retro and forward-looking. Visually and culturally, the scene leans into neon-soaked, anime-tinged aesthetics and nostalgic party energy, turning classic pop and boogie flavors into compact, danceable edits tailored for the web era.

J-pop (Japanese pop) is a broad umbrella for mainstream Japanese popular music that blends Western pop/rock, dance, and R&B with distinctly Japanese songwriting, vocal delivery, and industry practices. It is characterized by strong hooks, polished production, bright synths and guitars, frequent key changes and modulatory bridges, and chorus-first or chorus-centric structures. J-pop spans idol groups, singer-songwriters, band-oriented pop-rock, electronic dance-pop, and R&B ballads, while remaining closely tied to television, advertising, video games, and anime tie-ins (anisong).

Techno kayō (テクノ歌謡) is a Japanese pop style that fuses the melodic songwriting and vocal aesthetics of kayōkyoku with the synthetic textures, drum machines, and sequenced grooves of late‑70s/early‑80s technopop and new wave. It is characterized by bright, hook‑forward melodies; programmable rhythms (often 4/4 with syncopated accents); glassy analog and early‑digital synthesizers; and an overall glossy, futuristic atmosphere. While danceable and electronic, it retains kayōkyoku’s verse–chorus craft, lyrical directness, and distinctly Japanese melodic turns (including pentatonic “yona‑nuki” coloration). The style flourished in the early to mid‑1980s around the extended Yellow Magic Orchestra (YMO) circle, spilling into idol and mainstream pop productions. Its sound became a key stepping stone from Showa‑era kayōkyoku to Heisei‑era J‑Pop, and a foundation for later Shibuya‑kei, denpa, and Vocaloid aesthetics.

Idol kayō is a strand of Japanese popular song (kayōkyoku) centered on manufactured "idol" singers who present a wholesome, approachable image alongside catchy, highly arranged pop tunes. It emphasizes bright melodies, simple romantic or seasonal themes, and choreography-ready hooks that translate well to television variety shows and live fan events. Sonically it sits between classic kayōkyoku and later J-pop, often blending disco rhythms, string and brass arrangements, and early synth-pop colors, with key changes and memorable refrains designed for mass appeal.