Dungeon ∞ Spiral is an immersive attraction facility located on the 4th floor of Tokyu Kabukicho Tower in Tokyo.
Unfortunately, it has been decided that it will close on Saturday, February 28, 2026, but a collaboration project with the TV anime Gnosia is currently being held as a finale project from Wednesday, February 11 to Saturday, February 28, 2026!
Influencer and YouTuber Fujii Yodan went to experience it firsthand!
Dungeon ∞ Spiral and TV Anime Gnosia Collaborate!
You have boarded the spaceship D.Q.O.
Among the 15 crew members, two Gnosia have snuck in, hiding their true identities.While playing games at the onboard activity facilities, earn the crew's trust—represented by voting rights—and expose the Gnosia through voting.
However, the only thing you can do is play games using your body.Well then, have a safe journey.
(Translated from Japanese)
Gnosia x Dungeon ∞ Spiral Special Page
...So, starting from Wednesday, February 11, 2026, Dungeon ∞ Spiral has changed to Gnosia specifications!
You can enjoy an experience different from the usual Dungeon ∞ Spiral.
The person challenging this Dungeon ∞ Spiral is influencer and YouTuber Fujii Yodan (@MTNRFG)
First, let's listen to the explanation.
(The pictures shown hereafter are from the time of the interview, and some specifications may change in the future.)
The TV anime Gnosia is a sci-fi loop mystery based on a video game themed around the social deduction game Werewolf.
Fujii Yodan will challenge various attractions as a crew member of the spaceship D.Q.O.
Saiga NAK
There are 15 other crew members on the spaceship D.Q.O., but it is said that two of them are infected by Gnosia.
Gnosia-infected individuals attack humans at night, so the infected must be put into cold sleep as quickly as possible to prevent the damage from spreading.
By defeating bosses that appear within Dungeon ∞ Spiral, you earn trust from other crew members.
The more cold-sleep voting rights you have, the higher the probability of successfully putting a Gnosia-infected person into cold sleep.
Once you finish setting your personal avatar and team name, it's time to head out!
First, the individual battles
First is the individual battle where a player challenges a randomly selected puzzle alone.
This time, we were allowed to experience several of them as a special case.
Chalice of Inspiration, where you restore scattered pieces to their original state.
Fujii Yodan: "It looks like spatial awareness is necessary. As a former science major, this kind of puzzle is..."
Fujii Yodan: "Oh?"
Fujii Yodan: "Wait, what?"
Fujii Yodan: "Phew..."
Although Fujii Yodan's play seemed to have many failures, he somehow managed to earn an A rank.
For now, he's off to a good start.
Next to challenge is Arrow of Wisdom, where you pull a ball with your finger to collect medals.
Fujii Yodan: "It's like billiards, right? Leave it to me."
The key is to use the walls effectively to collect medals, but...
Fujii Yodan: "This is bad. The wall is too big."
Fujii Yodan: "The medals I can't get are starting to look like college credits..."
Fujii Yodan: "A B is totally acceptable!"
During the collaboration period, panels of each character appear within the facility!
Fujii Yodan also took a commemorative photo.
...And so, after clearing three puzzles, he moves on to the next part.
To succeed in putting the Gnosia-infected individuals into cold sleep, let's excel in the attractions and earn the trust of the crew members!
Collect voting rights in cooperative attractions!
Now, this is where the real work begins.
After finishing the puzzles that were individual battles, from here on, he will cooperatively conquer three designated games in a group of two or three people.
The first game is Cave.
One person turns a handle to adjust the speed of the minecart, while the remaining players throw balls at the enemies.
Saiga NAKPlaying while being watched by Jina and SQ.
Fujii Yodan, who was in the tennis club, has very good control...
Saiga NAKSuccess in defeating the boss!
Fujii Yodan: "Humans grow stronger by the number of their failures."
Recognized by Jina and the others, he earned voting rights!
Let's keep going like this and—
Fujii Yodan: "I'm incredibly tired."
Since drinks with lids are allowed, don't forget to stay properly hydrated!
The second attraction is Wasteland, where one person turns a handle to load cannonballs, and the remaining players pull a rope to launch them at enemies.
Fujii Yodan facing off against a powerful enemy with the intensity of venting his daily frustrations.
Fujii Yodan: "This is so tough I can't help but laugh..."
Fujii Yodan: "Calling me foolish!?"
The third attraction is Altar, where one person plays memory while the remaining players assemble a large puzzle.
Can he make use of his characteristic intellect?
It's easy at first, but...
Defeating the boss is no simple task.
Still, he somehow fought through...
Fujii Yodan: "I wonder if I was able to show my science major side."
Saiga NAK
Raqio and Remnan also recognized Fujii Yodan's efforts.
Fujii Yodan: "I heard I'd be exercising, but I didn't think it would be this intense..."
Saiga NAKFinally, he challenges while being watched by Setsu!
The last attraction is Erebus, where you defeat enemies appearing one after another by touching them.
Since this attraction uses four sides of the room, aim to defeat the boss while calling out to your companions.
He didn't achieve a complete defeat, but it was unexpectedly well-done.
He was also praised by Setsu.
Fujii Yodan: "I can do it if I try. If I try."
Who is the Gnosia?
With the voting rights he earned in hand, he heads to the polling place.
Voting starts!
In the TV anime Gnosia, Gnosia-infected individuals are identified through discussion, but since it's the first day, there are no hints.
I feel sorry for everyone, but I selected five people by intuition!
They will be put into cold sleep.
What will the result be...
Unfortunately, it seems there are still Gnosia-infected individuals on board.
And both of them!?
Setsu: "Did you understand?"
Fujii Yodan: "No, I don't get it at all!!"
As a play bonus, you can receive playing card-style cards (15 variations in total)!
Furthermore, players who successfully identified Gnosia-infected individuals will receive up to two additional cards as a gift!
Also, players who successfully put two Gnosia-infected individuals into cold sleep will be given the right to challenge Hard Mode.
If they can successfully identify two Gnosia-infected individuals there, it's a generous project where they can receive an original QUO card!
Actually, the video of this polling place is being broadcast live at the entrance of Dungeon ∞ Spiral.
If you watch other participants' votes, it might serve as a hint for identifying Gnosia-infected individuals...
Souvenirs with the digital photo service too!
Furthermore, you can experience a digital photo service as a play bonus.
Let's take photos with characters who might be Gnosia-infected!
Fujii Yodan also tried it out!
When you scan the 2D code printed on the receipt...
It was a spectacular failure.
...But surprisingly! Only when no one is waiting, you can experience it as many times as you like!
It's kind to scatterbrains like Fujii Yodan.
Please switch after one go if people are waiting!
Saiga NAK
As mentioned earlier, many photo spots are installed within Dungeon ∞ Spiral.
A must-see for Gnosia fans!
Saiga NAK
Furthermore, limited to those who played this Dungeon ∞ Spiral x TV anime Gnosia collaboration, you can purchase player selection screen-style acrylic stands (15 variations in total).
／
📢 #グノーシア コラボ限定グッズ
受注販売決定‼️
＼2/11(水)以降、現地でゲームをプレイいただいた方限定で、
【プレイヤー選択画面風アクリルスタンド】のオンライン受注販売を実施いたします✨… https://t.co/Ba7pGzKBYn— THE TOKYO MATRIX：ダンジョン∞スパイラル (@thetokyomatrix) February 13, 2026
Note that at the time of writing, acrylic stands for some characters like Jina, Remnan, and Setsu are sold out.
It is also said that the original QUO cards have reached their planned distribution limit.
However, the management as follows:
- Player selection screen-style acrylic stands (15 variations in total): Online made-to-order sales decided
- Original QUO cards: Scheduled for redistribution from Saturday, February 14, 2026
...is showing movement in response to the great reception, such as announcing the following:
Please check the Dungeon ∞ Spiral official X (@thetokyomatrix) for the latest information.
The collaboration project full of Gnosia from start to finish is being held until Saturday, February 28, 2026!
Check the Dungeon ∞ Spiral x TV Anime Gnosia Collaboration Special Page for details!
Interview with Manager Matsudaira!
The following blockquotes are translated from Japanese.
— Please tell us how this collaboration came about.
Matsudaira: Because Sony Music Group operates this facility, I was looking at anime handled by Aniplex.
Among them, since Gnosia is set on a spaceship and includes a bit of a cyber feel, I thought the atmosphere was a perfect match!
So I brought the idea to the producer of the TV anime Gnosia, and this collaboration became a reality.
Yuri's clothing is also in Dungeon Spiral colors, isn't it? (laughs)
— There were also newly recorded voices.
Matsudaira: Setsu and LeVi are completely newly recorded, and we asked Ikumi Hasegawa and Saori Hayami for long recordings.
— LeVi's announcements were so natural that I wondered if they were always like that.
Matsudaira: The atmosphere really is a perfect match.
Saori Hayami also gave a perfect performance, as if to say, "I understand everything."
Saiga NAK— The tug-of-war attraction Wasteland was the most exhausting.
Matsudaira: It's heavy labor, isn't it? (laughs)
That has a pressure sensor on the back that's sturdy enough for even a sumo wrestler to pull.
We made it aiming for a realistic experience where you pull with all your might to launch a cannonball far away.
— The attractions experienced this time are just a small part, right?
Matsudaira: That's right.
Attractions are selected randomly each time, but there's jumping in rhythm, pedaling a stationary bike, and sprinting seriously for over 20 meters...
You can really exercise enough to build your body just here.
— Finally, please give a message.
Matsudaira: Dungeon ∞ Spiral has been operated as a unique attraction facility where you can have a great adventure with friends and family while being in the city center.
Unfortunately, it will close at the end of February, but I hope you take this opportunity to fully enjoy the world collaborated with Gnosia.
Saiga NAK
