Yoichi Ochiai’s “null²ⁿ” Opens at Yokohama Landmark Plaza; Expo Pavilion Becomes a Permanent Theater

“null²” (pronounced “nulnul”), the Expo 2025 Osaka, Kansai signature pavilion produced by Yoichi Ochiai, has become a permanent facility in Yokohama. It opened as the museum theater “null²ⁿ” (pronounced “nulnul nexus”) on Wednesday, October 14, 2026, on the 5th floor of Landmark Plaza in the Yokohama Landmark Tower (Nishi Ward, Yokohama). According to the official website, it consists of five experience areas and, at their core, a theater with two giant LED screens, and the experience takes about 60 minutes on average. Entry is by advance reservation for a specific date and time only, and adults (13 and over) pay 3,900 yen on weekdays and 4,500 yen on Saturdays, Sundays and public holidays.

Why Yokohama? Opening one year and one day after the Expo closed

Expo 2025 Osaka, Kansai closed on October 13, 2025. The announcing company, Sustainable Pavilion 2025 Inc., chose October 14, one year and one day later, as the opening day and positioned the venue as a new facility inheriting the legacy of null². The “ⁿ” in the name stands for nexus, expressing the idea of connecting people, experiences and places.

The official website notes that “more than 25.5 million people came” to the Expo, “and only about 2 percent of them got inside null²,” and puts the number of people who encountered null² in Osaka at 540,000. A pavilion that was open only for the Expo period is now presented as a permanent facility within a commercial complex. The official website lists Macnica, Mitsubishi Estate, NEC and JTB as sponsors.

Yoichi Ochiai was born in 1987. According to the press materials, he is a professor at the University of Tsukuba and director of its Digital Nature Development Research Center, and served as a Theme Project Producer for Expo 2025 Osaka, Kansai.

What can visitors experience? From a gate of mirrors through darkness to a gallery of inventions

The floor guide on the official website introduces the rooms in order from entrance to exit. From the entrance, “Gate (Kaiku Kyomon),” where visitors enter a mirrored space and leave behind their names and titles, they proceed to the “First Room (Goodbye, Homo Sapiens),” where they let go of symbols. The “Second Room (Dream of the Realm Without Eyes)” is a space of complete darkness where visitors only listen to sound, experienced seated.

The “Third Room (Longing for Mass)” is a gallery of inventions from all times and places, and the “Fourth Room (Dream of Latent Space)” envelops visitors in images of latent space. At the exit, the “Bridge (The Far Shore of Symbols),” the mirrors become transparent, revealing the rooms visitors have passed through. The concept is “The Radiance of Life Within Computational Nature,” and the facility also presents the “Mirrored Body,” which it describes as “facing mirrors made of digital bodies.”

Tickets, prices and opening hours

Tickets are sold on the official website, and entry is by QR code on a smartphone. Prices (tax included) are 3,900 yen on weekdays and 4,500 yen on Saturdays, Sundays and public holidays for adults (13 and over), and 3,000 yen on weekdays and 4,000 yen on Saturdays, Sundays and public holidays for children (4–12). Limited-quantity tickets with an original pin badge cost 11,900 yen on weekdays and 12,500 yen on weekends and holidays for adults, and 11,000 yen and 12,000 yen for children. Children 3 and under are free, up to one per adult, and those 12 and under cannot enter on their own.

If places are available, tickets can also be bought on the day on the official website or at the on-site counter, but counter prices differ from online prices, and payment is cashless only. Tickets bought on the official website can be changed to another date and time until 23:59 on the day before the reservation. As of October 20, the timing for opening reservations for December onward had not been decided.

Opening hours are 9:30–21:00 (planned), with the last time slot meeting at 19:40. There may be closed days, which are announced on the official calendar. Photography is allowed inside, but flash, tripods and selfie sticks are not. Because there are mirrors on the floor, visitors are asked to avoid heels and sandals. The experience includes darkness, flashing lights and loud sounds, and visitors who are sensitive to light, among others, are advised to take care.

It is about a 3-minute walk from Minatomirai Station on the Minatomirai Line and about a 5-minute walk from Sakuragicho Station on the JR Negishi Line and the Yokohama Municipal Subway Blue Line. According to Landmark Plaza, a limited-time merchandise shop, “null2 Shop,” also opened on the opening day. Immersive experience venues are introduced in our guide to immersive art venues, and the plan for “teamLab TOKYO (provisional name)” in Ariake, Tokyo, in a separate article.

Facility overview

Name: null²ⁿ (nulnul nexus)
Opened: Wednesday, October 14, 2026
Hours: 9:30–21:00 (planned; last time slot meets at 19:40)
Closed: See the official calendar
Venue: Landmark Plaza 5F, Yokohama Landmark Tower
Address: 2-2-1 Minatomirai, Nishi-ku, Yokohama, Kanagawa
Admission: Adults (13 and over) weekdays 3,900 yen / Saturdays, Sundays and public holidays 4,500 yen; children (4–12) weekdays 3,000 yen / Saturdays, Sundays and public holidays 4,000 yen (tax included; advance reservation for a specific date and time only)
Producer: Yoichi Ochiai
Announced by: Sustainable Pavilion 2025 Inc.
Official website: https://null2.nexus
*Information as of October 20, 2026. Please check the official website for the latest information.

*Top image: The interior of null²ⁿ under construction (September 15, 2026) (from a press release by Sustainable Pavilion 2025 Inc.)

*This article was compiled by the TOKYO ART SPHERE editorial team based on press materials from Sustainable Pavilion 2025 Inc. (September 19, 2026), the null²ⁿ official website and an announcement by Yokohama Landmark Plaza.

Text: TOKYO ART SPHERE Editorial Team