Night-exclusive Immersive Mystery-Solving Event "Sunshine Aquarium x Aquarium is Not Dancing: Challenge from the Director" June 12 (Fri) - July 20 (Mon/Holiday)
Sunshine Aquarium will host the second collaboration with the free horror game "Aquarium is Not Dancing," presenting a night-exclusive immersive mystery-solving event from June 12 to July 20. The event, titled "Challenge from the Director," recreates the game's mysterious world within the aquarium, featuring a paid mystery-solving rally, special decorations, and new illustrations.
📋 Article Processing Timeline
- 📰 Published: May 11, 2026 at 20:00
- 🔍 Collected: May 11, 2026 at 11:31
- 🤖 AI Analyzed: May 12, 2026 at 03:51 (16h 19m after Collected)
Sunshine Aquarium (Ikebukuro, Tokyo) will host the second collaboration with "Aquarium is Not Dancing," a representative Reiwa horror free-to-play game, for a night-exclusive immersive mystery-solving event titled "Sunshine Aquarium x Aquarium is Not Dancing: Challenge from the Director," from Friday, June 12 to Monday, July 20 (public holiday).
Having surpassed 800,000 total downloads by January 2026, with a manga serialization in KADOKAWA Dengeki Maoh and a Nintendo Switch™ packaged version release, the world of "Aquarium is Not Dancing" is making a return to Sunshine Aquarium. The mysterious world of the game will be recreated within the aquarium setting.
Following the first collaboration in October 2025, this second installment will feature a paid mystery-solving rally where participants become the protagonists, just like in the game. It will also include spatial design and a worldview reminiscent of the game, with special decorations more faithful to the original work than before. Furthermore, new illustrations drawn exclusively for this collaboration event will appear. The event’s story follows "Aquarium Does Not Awaken," the first collaboration, making it enjoyable for those who participated in the first event, as well as newcomers to the "Aqu-Odo" world.
The "healing" aquarium transforms into an "eerie" space. This immersive, experiential mystery-solving aquarium will appear exclusively at night.
▼Download the PDF of this press release here
https://prtimes.jp/a/?f=d20364-1109-3f1bf830897d60cf82b415295cc4ac43.pdf
What is "Aquarium is Not Dancing"?
[Horror x Aquarium x Mystery-Solving Adventure created by a horror-averse developer] Triggered by a friend’s request for illustration work, the horror-averse creator, Mr. Daidai, spent eight years alone developing and completing this free horror game. It was released as a free game on February 15, 2024. It achieved 100,000 downloads in two days and surpassed 800,000 cumulative downloads by January 2026.
It won the Gold Prize in the Scenario Division at "PLiCy Game Contest 2024," one of Japan's largest free game contests. With Nintendo Switch™ and Steam versions also released, its popularity is expanding. An official manga serialization by KADOKAWA Dengeki Maoh is also ongoing.
--- Who is the traitor?
Author: Mr. Daidai's Comment
First collaboration... The "Let's do it again!" with the director became a reality, and I, Daidai, the original author, am more surprised than anyone! I can't thank the staff enough. Just tell me anything; I'll really do it. And the fact that there's a second time means the first one was well-received. Thank you to everyone who visited more than expected and always makes the companies buzz. Please make them buzz this time too.
Event Outline
Event Name:
Night-exclusive Immersive Mystery-Solving Event "Sunshine Aquarium x Aquarium is Not Dancing: Challenge from the Director"
Venue: Sunshine Aquarium
Dates: June 12 (Fri) - July 20 (Mon/Holiday)
[Weekdays] 16:00 - 19:00 [Weekends/Holidays] 17:00 - 20:00 *Last admission 30 minutes before closing.
Admission: Enjoyable with the aquarium admission fee. *Mystery-solving rally costs 500 yen.
Event Special Website: https://sunshinecity.jp/aquarium/event_performance/event/entry-37195.html
*Request regarding event name notation: If the full name is too long for headings or body text, please use the abbreviated form "Sunshine Aquarium x Aquarium is Not Dancing: Challenge from the Director".
Event Content
◆Mystery-Solving Rally
Enjoy a "mystery-solving experience" just like the main game, enveloped in the world of "Aquarium is Not Dancing" with a mystery-solving rally sheet. Can you answer all the challenges from the director and reach the truth? All participants will receive one ending card!
Price: 500 yen
How to Participate: Sales start from 10:00 on Friday, June 5, on the reservation site "Asoview!".
Please purchase the "Mystery-Solving Rally Sheet".
*Detailed purchase methods will be announced later on the aquarium's website and official SNS.
*Ending card designs vary by period.
*Sales of mystery-solving rally sheets close 45 minutes before the end time.
[Synopsis]
A letter arrived at Sunshine Aquarium.
The letter was from the director of Bianca Aquarium. The letter contained encrypted characters on the Sunshine Aquarium's map, suggesting some kind of mes...
Having surpassed 800,000 total downloads by January 2026, with a manga serialization in KADOKAWA Dengeki Maoh and a Nintendo Switch™ packaged version release, the world of "Aquarium is Not Dancing" is making a return to Sunshine Aquarium. The mysterious world of the game will be recreated within the aquarium setting.
Following the first collaboration in October 2025, this second installment will feature a paid mystery-solving rally where participants become the protagonists, just like in the game. It will also include spatial design and a worldview reminiscent of the game, with special decorations more faithful to the original work than before. Furthermore, new illustrations drawn exclusively for this collaboration event will appear. The event’s story follows "Aquarium Does Not Awaken," the first collaboration, making it enjoyable for those who participated in the first event, as well as newcomers to the "Aqu-Odo" world.
The "healing" aquarium transforms into an "eerie" space. This immersive, experiential mystery-solving aquarium will appear exclusively at night.
▼Download the PDF of this press release here
https://prtimes.jp/a/?f=d20364-1109-3f1bf830897d60cf82b415295cc4ac43.pdf
What is "Aquarium is Not Dancing"?
[Horror x Aquarium x Mystery-Solving Adventure created by a horror-averse developer] Triggered by a friend’s request for illustration work, the horror-averse creator, Mr. Daidai, spent eight years alone developing and completing this free horror game. It was released as a free game on February 15, 2024. It achieved 100,000 downloads in two days and surpassed 800,000 cumulative downloads by January 2026.
It won the Gold Prize in the Scenario Division at "PLiCy Game Contest 2024," one of Japan's largest free game contests. With Nintendo Switch™ and Steam versions also released, its popularity is expanding. An official manga serialization by KADOKAWA Dengeki Maoh is also ongoing.
--- Who is the traitor?
Author: Mr. Daidai's Comment
First collaboration... The "Let's do it again!" with the director became a reality, and I, Daidai, the original author, am more surprised than anyone! I can't thank the staff enough. Just tell me anything; I'll really do it. And the fact that there's a second time means the first one was well-received. Thank you to everyone who visited more than expected and always makes the companies buzz. Please make them buzz this time too.
Event Outline
Event Name:
Night-exclusive Immersive Mystery-Solving Event "Sunshine Aquarium x Aquarium is Not Dancing: Challenge from the Director"
Venue: Sunshine Aquarium
Dates: June 12 (Fri) - July 20 (Mon/Holiday)
[Weekdays] 16:00 - 19:00 [Weekends/Holidays] 17:00 - 20:00 *Last admission 30 minutes before closing.
Admission: Enjoyable with the aquarium admission fee. *Mystery-solving rally costs 500 yen.
Event Special Website: https://sunshinecity.jp/aquarium/event_performance/event/entry-37195.html
*Request regarding event name notation: If the full name is too long for headings or body text, please use the abbreviated form "Sunshine Aquarium x Aquarium is Not Dancing: Challenge from the Director".
Event Content
◆Mystery-Solving Rally
Enjoy a "mystery-solving experience" just like the main game, enveloped in the world of "Aquarium is Not Dancing" with a mystery-solving rally sheet. Can you answer all the challenges from the director and reach the truth? All participants will receive one ending card!
Price: 500 yen
How to Participate: Sales start from 10:00 on Friday, June 5, on the reservation site "Asoview!".
Please purchase the "Mystery-Solving Rally Sheet".
*Detailed purchase methods will be announced later on the aquarium's website and official SNS.
*Ending card designs vary by period.
*Sales of mystery-solving rally sheets close 45 minutes before the end time.
[Synopsis]
A letter arrived at Sunshine Aquarium.
The letter was from the director of Bianca Aquarium. The letter contained encrypted characters on the Sunshine Aquarium's map, suggesting some kind of mes...