Acid Pumper

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Acid Pumper

Song Information

Artist: ni-21
Composition/Arrangement: ni-21
BPM: 150
Length: 1:58
VJ: かーる
First Music Game Appearance: beatmania IIDX 23 copula
Other Music Game Appearances: None.



Song Connections / Remixes

  • A long version of Acid Pumper, titled Acid Pumper (Extended Mix), appears on the beatmania IIDX 23 copula ORIGINAL SOUNDTRACK album.
  • An updated long version of Acid Pumper, titled Acid Pumper (Extended Mix Private Edit 2016), was played live by ni-21 at the TOKYO HARD GROOVE SESSION'16 event. It is unknown if this version will be released.


  • Acid Pumper marks Shigeyuki Niimura's debut in BEMANI.
  • According to Shigeyuki's song comments for Acid Pumper, he has never played beatmania IIDX.
  • The video for Acid Pumper was done by re-editing a generic video from beatmania IIDX 18 Resort Anthem.
  • According to an interview with Shigeyuki Niimura, he named Acid Pumper as "it started with "A-C." So, I figure that if people look at the music from A to Z, my music would be first in line!" [1]. True to this plan, Acid Pumper is first in the beatmania IIDX 23 copula folder when sorting in alphabetical order.
  • The green-haired girl in the BGA is named Riko.
  • Acid Pumper is available in beatmania IIDX INFINITAS as part of beatmania IIDX INFINITAS 楽曲パック vol.10.

Song Production Information


Hello everyone.
I am ni-21, known as "the person that I do not know how to read" in the HARD DANCE world.
...It is read "ni-ni".
I thought of a name change, but I prefer to go with "the person that I do not know how to read" branding.

Recently I have been working on songs featuring "acid" (a unique "biyobiyo unyounyo" sound played by Roland's legendary bass synth "TB-303"). The song that I produced this time, Acid Pumper, it is the introduction to "acid" sounds. I am proud of it, as probably it is considerably different among the songs recorded in beatmania this time.

Actually, I almost never play games, so I have never played beatmania. (I'm sorry KONAMI!)
I am looking forward to how my song is played in your hands and how it sounds on the scene.

Video Production Information


Difficulty & Notecounts

beatmania IIDX difficulty rated from 1 to 12. (Ratings and notecounts obtained from BEMANIWiki 2nd and TexTage.)

Game SP Difficulty DP Difficulty
Notecounts / Hell Charge Notes / Hell Backspin Scratches - 348 / 53 / 0 812 / 112 / 2 1267 / 120 / 5 - 392 / 46 / 4 850 / 81 / 6 1221 / 88 / 8 -
beatmania IIDX 23 copula→Present - 4 9 11 - 5 9 11 -
beatmania IIDX ULTIMATE MOBILE - 4 9 11 - - - - -
beatmania IIDX INFINITAS - 4 9 11 - 5 9 11 -