Overview
フキゲンワルツ (Fukigen Waltz) is a Vocaloid track by OSTER project featuring Hatsune Miku, added to maimai on January 11, 2019, during the FiNALE version. The title translates to "Grumpy Waltz", a fitting description for a song that wraps a brisk 210 BPM tempo in the formal structure of a 3/4 waltz, creating a playful friction between elegance and agitation.
OSTER project is a veteran composer in the Vocaloid and doujin music scene, widely known for enduring niconico hits such as "マトリョシカ" (Matryoshka, co-produced with Hachioji P) and numerous contributions to the Hatsune Miku: Project DIVA game series. The in-game background video for フキゲンワルツ is drawn directly from the Project DIVA 3D music video, featuring Miku in a ballroom setting that mirrors the waltz motif.
The maimai charts for this song have been revised upward multiple times across versions. The Expert chart, originally Lv8+ at launch, was re-evaluated to Lv9 and later to Lv10 by UNiVERSE+. The Master chart (designed by 小鳥遊さん / Takanashi-san) rose from Lv12 to Lv13 over the same period and stands out for its slide-heavy construction, with 96 Slide notes among a total of 776, a configuration that challenges players to track rapid triple-meter phrasing at high speed. The song remains exclusive to Japanese arcade cabinets and has not received DX-style charts with Touch notes.
Videos
Charts
Trivia
- The title フキゲンワルツ combines 不機嫌 (fukigen, meaning grumpy or sulky) with ワルツ (warutsu, waltz), giving the song a moody, playful identity.
- Up until the BUDDiES PLUS version, the in-game artist credit read 'OSTERproject' without a space. It was corrected to 'OSTER project' starting with the PRiSM version.
- The in-game background video uses the 3D music video from Hatsune Miku: Project DIVA, directly tying the song to Sega's Vocaloid rhythm game franchise.
- The combination of a 3/4 waltz time signature with a 210 BPM tempo is unusually fast for a waltz and relatively rare in maimai's song library.
- OSTER project composed several songs for the Project DIVA series before and after this track, making the DIVA MV crossover a natural fit.
- The Master chart (13.2) contains 96 Slide notes, roughly 12.4% of its 776 total note count, making slide recognition and positioning a key skill check for high-score runs.
- Both the Expert and Master charts received difficulty increases over multiple maimai versions, a sign that the community perceived them as harder than their original ratings suggested.
- The song is region-locked to Japanese arcades and has no DX chart variant, meaning it retains its original FiNALE-era 4-note-type structure (Tap, Hold, Slide, Break) without Touch notes.
- Expert chart designer 玉子豆腐 (Tamago Tofu) and Master chart designer 小鳥遊さん (Takanashi-san) are both active contributors to maimai's chart lineup from the FiNALE era onward.
FAQ
- Who composed フキゲンワルツ (Fukigen Waltz)?
- The song was composed by OSTER project, a veteran Vocaloid and doujin music producer best known for tracks like マトリョシカ (Matryoshka) and for contributing songs to the Hatsune Miku: Project DIVA series.
- What version of maimai added フキゲンワルツ?
- It was added on January 11, 2019, during the maimai FiNALE version. It remains available in current Japanese arcade builds but has not received DX-style charts with Touch notes.
- What does フキゲンワルツ mean in English?
- フキゲンワルツ translates to 'Grumpy Waltz', 不機嫌 (fukigen) means bad mood or displeasure, and ワルツ (warutsu) means waltz. The title reflects the song's playful contrast between formal waltz structure and a driving, energetic tempo.
- Who designed the Expert and Master charts?
- The Expert chart was designed by 玉子豆腐 (Tamago Tofu), and the Master chart was designed by 小鳥遊さん (Takanashi-san).
- Why does the background video look like a Project DIVA music video?
- The in-game background video is directly taken from the Hatsune Miku: Project DIVA 3D music video for the song, showing Miku performing in a ballroom setting that matches the waltz theme.
- Why did the artist name change from OSTERproject to OSTER project?
- Until the BUDDiES PLUS version, the game credited the artist as 'OSTERproject' with no space. The correct spacing, 'OSTER project', was restored starting with the PRiSM version.
- Is フキゲンワルツ available outside Japan?
- No, the song is exclusive to Japanese arcade cabinets. The truth data lists its region availability as JP only.
