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= 青の洞窟 =

== Song Information ==
Artist: Ujico*<br>
Composition/Arrangement: [[Keitaro Ujiie|Ujico*]]<br>
BPM: 175<br>
Length: 2:12<br>
Genre: AQUARIUM QUARTERSTEP<br>
Movie: BEMANI Designers "[[maysea]]"<br>
First Music Game Appearance: [[AC CastHour|beatmania IIDX 29 CastHour]]<br>
Other Music Game Appearances: None.

== Lyrics ==
None.

== Song Connections / Remixes ==
None.

== Trivia ==
* 青の洞窟 is one of the ''PLATFORM 2 Twinkroom'' unlocks of beatmania IIDX 29 CastHour's ''CastHour SPACE'' unlocking system. It could be unlocked from January 13th, 2022.
** From February 13th, 2023, its charts can be purchased in [[AC RESIDENT|beatmania IIDX 30 RESIDENT]] with [[AC RESIDENT/Hizou no record|Hizou no record]] (秘蔵のレコード).
** As of [[AC EPOLIS|beatmania IIDX 31 EPOLIS]], it is available by default.
* 青の洞窟 marks Keitaro Ujiie's first beatmania IIDX song credited to his Ujico* alias.
* When 青の洞窟 is played in beatmania IIDX, the arcade LED ticker displays "BLUE GROTTO".
* According to Ujico* on his [https://twitter.com/ujicosnail/status/1481483195157598212?s=20 Twitter], 青の洞窟 references the locations in both Capri, Italy and Onna, Okinawa, both being sea caves where the sunlight passes through the underwater cavity to give off a blue colored reflection, thus giving them the name of Blue Grotto.
* 青の洞窟's genre was misspelled as '''AQUARIUM QUATERSTEP''' upon its debut in beatmania IIDX 29 CastHour. This was corrected on January 25th, 2022.
* 青の洞窟 is available in [[CS INFINITAS 2020|beatmania IIDX INFINITAS (2020)]] as part of the '''beatmania IIDX INFINITAS Music Pack vol.23''' (beatmania IIDX INFINITAS 楽曲パック vol.23).

== Song Production Information ==
Untranslated.

== Video Production Information ==
Untranslated.

== Difficulty & Notecounts ==
beatmania IIDX difficulty rated from 1 to 12. (Notecounts obtained from [http://www.bemaniwiki.com BEMANIWiki 2nd].)

{{IIDX Chart Header|
{{IIDX Chart Notecounts|-|455|1033|1600|-|472|1027|1560|-}}
{{IIDX Chart|beatmania IIDX 29 CastHour&rarr;Present|-|4|9|11|-|4|9|11|-}}
{{IIDX Chart|beatmania IIDX INFINITAS (2020)|-|4|9|11|-|4|9|11|-}}
}}

{{CastHour SPACE}}

[[Category:Songs]]
[[Category:beatmania IIDX Songs]]
[[Category:beatmania IIDX Songs Never Removed]]
[[Category:beatmania IIDX Songs with Unique Videos]]