Theory of Eternity

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Theory of Eternity

Song Information

Theory of Eternity's jubeat jacket.
Theory of Eternity's DanceDanceRevolution jacket.

Artist: TAG
Composition/Arrangement: TAG
BPM: 160
Length: 1:55
First Music Game Appearance: DanceDanceRevolution X2 / jubeat knit APPEND
Other Music Game Appearances:



Song Connections / Remixes



  • Theory of Eternity could be unlocked in jubeat knit APPEND as part of the APPEND FESTIVAL event, by playing I'm so Happy in DanceDanceRevolution X2. By then playing Theory of Eternity in jubeat knit APPEND, the song was available in DanceDanceRevolution X2.
    • As of September 19th, 2011, Theory of Eternity has been unlocked in DanceDanceRevolution for normal play.
    • Theory of Eternity was not playable in the North American/European arcade release of DanceDanceRevolution X2 due to the lack of e-AMUSEMENT in those regions.
    • In jubeat copious and its APPEND version, it is one of the UFO unlocks of the copious travel unlocking system.
      • In jubeat saucer, it can be unlocked via the bistro saucer unlocking event.
      • In jubeat saucer fulfill, it can be unlocked as part of saucer macchiato's Side Menu from April 23rd, 2014.
      • In jubeat prop, it can be unlocked by playing it as a BONUS TUNE from May 28th, 2015.
      • In jubeat Qubell, it is one of the Garnet unlocks of the dig dig Qubell unlocking system.
      • In jubeat clan, it can be unlocked in the jubeat SHOP.
      • In jubeat festo, it can be purchased at the emo MART.
      • In jubeat Ave., it is one of the CONCIERGE unlocks of the LIGHT CHAT unlocking system from August 17th, 2022.
      • From jubeat beyond the Ave. onwards, it is available by default with an e-amusement pass.
  • Theory of Eternity was the last KONAMI original song from jubeat knit APPEND to appear in jubeat plus, appearing in music pack 24.
  • As DanceDanceRevolution II doesn't support Shock Arrows, Theory of Eternity's CHALLENGE charts are absent on that release.
  • Theory of Eternity's jubeat (2021) ratings were adjusted to its jubeat festo ratings on March 7th, 2022.
  • Theory of Eternity is available in DanceDanceRevolution GRAND PRIX's GRAND PRIX mode from February 20th, 2023, by purchasing the GRAND PRIX music pack vol.16 (グランプリ楽曲パック vol.16).

Song Production Information


What can we do within a limited time? What's remaining?

Even if you wish for eternity, you can't reach it, yet won't give up, you're close, yet so far, you're not too close or far, neither attached nor detached, about two sides of the same situation.
Meanwhile, as time passes by, even if you wanted to do something back then, it's already too late.

However, time which passes by is never wasted, and I feel that all I've experienced so far will help me survive in the future.

The passage of time makes us stronger.
To my past self, thank you and goodbye.

Staff Comments


You can play this song here and in DanceDanceRevolution as part of APPEND FESTIVAL.
For a long time, there wasn't a TAG song in jubeat, so I asked him "please compose for it! Please compose for it", and this finally happened.
Even though he has played jubeat quite a lot, the timing didn't fit, right? But, now it's linked with DDR and isn't exclusive to jubeat, so he'll have a jubeat original song next time!
I appealed to him, asking "please somehow compose a song for the next game! Please compose it!". I wonder if it will happen?

Difficulty & Notecounts

DanceDanceRevolution difficulty rated from 1 to 20 from X onwards.
jubeat to clan difficulty rated from 1 to 10, and 1 to 10.9 from festo onwards. (Ratings and notecounts obtained from BEMANIWiki 2nd and jubeat@Wiki.)


Game Single Double
Beginner Basic Difficult Expert Challenge Basic Difficult Expert Challenge
Notecounts / Freeze Arrows / Shock Arrows 132 / 0 228 / 12 317 / 9 419 / 6 275 / 12 / 46 228 / 8 316 / 14 416 / 8 275 / 14 / 45
DanceDanceRevolution X2→Present 3 6 9 12 10 6 9 12 11
DanceDanceRevolution II / hottest party5 3 6 9 12 - 6 9 12 -
DanceDanceRevolution GRAND PRIX 3 6 9 12 10 6 9 12 11


Game Level
Basic Advanced Extreme
Notecounts 427 725 858
jubeat knit APPEND→Qubell 5 8 9
jubeat clan ↓4 8 9
jubeat festo→Present 4 8 9.3
jubeat plus 5 8 9
jukebeat 5 8 9
jubeat plus (Android) 5 8 9
jubeat (2021) 4 8 9.3
jubeat Crossovers さよならトリップ - AREA 51 - Love♥km - I'm so Happy - Macuilxochitl
New jubeat Songs FLOWER - Jailbreak - STELLAR WIND - Theory of Eternity - キルト