Overview
深海シティアンダーグラウンド (Shinkai City Underground, lit. "Deep Sea City Underground") is a Vocaloid song by composer and lyricist Tanaka-B (田中Ｂ), featuring the synthesized voice of Kagamine Rin. The track originally appeared on the 2012 compilation album EXIT TUNES PRESENTS Vocalogemini feat. 鏡音リン・レン, a label release that showcased songs built around the twin Vocaloid characters. Its music video was produced by とりっちょ, よねしゃっく, and てぬ.
The song joined maimai でらっくす PLUS on July 17, 2020, as part of the niconico & VOCALOID genre category. Musically, it drives forward at a steady 170 BPM, pairing an energetic electronic-rock foundation with Rin's crisp, slightly detached vocal delivery. The lyrics paint a surreal, dystopian picture of a sunken city, a "deep sea city underground" where imagery of wilted flowers, plastic flies (ベルゼブブの羽音), three-legged crows, and a paranoid princess blend together. References to "hadopelagic zone" (the deepest layer of the ocean, below 6,000 meters) and the "Mariana Trench" appear in the game's achievement titles, reinforcing the song's submerged, alien atmosphere.
In maimai, the song is playable across four DX difficulty tiers. The Expert chart was designed by はっぴー (Happy), while the Master chart, rated at level 12+ with a constant of 12.8, was designed by サファ太 (Safata). With 724 total notes across Tap, Hold, Slide, Touch, and Break categories, the Master chart is a substantial layout that tests a player's ability to handle dense patterning at moderate tempo within a dark, lyrical context.
Videos
Charts
DX
BASIC
4(4)
187 notesDesigner: -|Tap 157Hold 3Slide 5Touch 16Break 6
ADVANCED
6(6)
389 notesDesigner: -|Tap 335Hold 19Slide 8Touch 13Break 14
EXPERT
10(10)
481 notesDesigner: はっぴー|Tap 361Hold 48Slide 54Touch 10Break 8
MASTER
12+(12.8)
724 notesDesigner: サファ太|Tap 512Hold 39Slide 104Touch 55Break 14
Trivia
- The song was added to maimai でらっくす PLUS on July 17, 2020 in Japan. The Asian version followed on December 18, 2020, and the Chinese version was added at the launch of 舞萌DX 2021.
- 深海シティアンダーグラウンド features Kagamine Rin (鏡音リン) on vocals, the female Vocaloid known for her bright, youthful tone, here used in a darker, more atmospheric song.
- The track was released on the compilation EXIT TUNES PRESENTS Vocalogemini feat. 鏡音リン・レン (2012), a Vocaloid album centered on the Kagamine twin characters.
- The in-game title 'hadopelagic zone' (achieved by playing 深海シティアンダーグラウンド alongside 深海少女 and ウミユリ海底譚 in one credit) references the ocean's hadal zone, depths below roughly 6,000 meters, named after Hades, the Greek underworld.
- Another in-game title, 'マリアナ海溝よりお届けします。' (We deliver from the Mariana Trench), is earned simply by playing the song once.
- The Master chart, designed by サファ太 (Safata), carries a level constant of 12.8, placing it at the upper end of the 12+ band and demanding strong command of slide and touch patterns.
- The lyrics weave a hallucinatory narrative with references to plastic Beelzebub, haniwa syndrome, a three-legged crow, and a paranoid (paranoia) princess, imagery that evokes both urban decay and deep-sea isolation.
- The English community wiki (RemyWiki) lists the song length as 2:33, a compact runtime typical of Vocaloid-origin tracks.
- As of the song's inclusion in maimai, it has no other music game appearances outside the maimai series.
FAQ
- Who composed 深海シティアンダーグラウンド?
- The song was composed, arranged, and written by Tanaka-B (田中Ｂ), who is credited as the sole artist for the track.
- Who sings 深海シティアンダーグラウンド?
- The vocals are provided by Kagamine Rin (鏡音リン), the female Vocaloid voicebank developed by Crypton Future Media.
- When was 深海シティアンダーグラウンド added to maimai?
- The song was added to maimai でらっくす PLUS on July 17, 2020 in Japan. The Asian version got it on December 18, 2020, and the Chinese version included it at the launch of 舞萌DX 2021.
- What is the meaning of the song title 深海シティアンダーグラウンド?
- The title translates to 'Deep Sea City Underground.' The lyrics describe a surreal underwater urban landscape blending oceanic and industrial decay imagery, with themes of paranoia, isolation, and hallucination.
- What album is 深海シティアンダーグラウンド from?
- It originally appeared on the 2012 compilation album EXIT TUNES PRESENTS Vocalogemini feat. 鏡音リン・レン, which focused on songs featuring the Kagamine Rin and Len Vocaloids.
- Who designed the Master chart for 深海シティアンダーグラウンド in maimai?
- The Master chart (level 12+, constant 12.8) was designed by サファ太 (Safata). The Expert chart was designed by はっぴー (Happy).
- What BPM is 深海シティアンダーグラウンド?
- The song runs at a steady 170 BPM throughout.
- Are there any other rhythm games that feature 深海シティアンダーグラウンド?
- As of its inclusion in maimai, the song has not appeared in any other music games, it is exclusive to the maimai series.
