Tokyo Metro and Kyujitsu Hack have teamed up to launch a new spinoff of their popular immersive experience game series, Metro Time Gate: Guardian Archivist, at the Tokyo Subway Museum (Chikahaku) in Edogawa, Tokyo, from June 26, 2026 (Friday).
Metro Time Gate is an immersive experience game series co-developed by Tokyo Metro and Kyujitsu Hack, in which participants become the protagonist and explore the city of Tokyo to advance the story. The series has received praise for its compelling characters and strong sense of narrative immersion, attracting a cumulative total of over 40,000 participants across all installments, including the currently running Ruby Express chapter.
The new Metro Time Gate: Guardian Archivist chapter distills the world of the series into the interior of the Tokyo Subway Museum itself. Rather than exploring the wider city, participants use the trains, documents, and archives on display within the museum as the keys to unraveling the mystery. The indoor setting also means the experience remains comfortable even on hot summer days or in bad weather.
As a standalone spinoff, Metro Time Gate: Guardian Archivist can be enjoyed without any prior experience of the main series. Participants who have completed the currently running Ruby Express chapter will also find a special bonus puzzle included.
What Is Metro Time Gate?
Metro Time Gate is an immersive experience game series co-developed by Tokyo Metro and Kyujitsu Hack, featuring original characters illustrated by manga artist Kenichi Watanabe. Players take on the role of the protagonist, exploring the streets of Tokyo while advancing through a story.
The Guardian Archivist chapter is a completely new spinoff that can be enjoyed by first-time players. Full details are available on the official page: https://metrotimegate.com/chikahaku
Story
New Characters
Chika Kasai
Chika dreams of becoming a Guardian Archivist. Deeply interested in the history and records of the Tokyo subway, she enters the certification exam to pursue that dream. While she is studious and genuinely capable, she struggles to fully believe in herself and often wears an uncertain expression. She admires Maru Shimochi of the Marunouchi Line for her bright and straightforward attitude, and is taking her first steps forward with the hope of becoming like her someday.
The Mystery Monster: チカいじゅう
A mysterious creature. Having heard rumors that "becoming an Archivist brings great rewards," チカいじゅう entered the certification exam driven by greed alone — only to fall far short on knowledge and stumble partway through. Rather than quietly stepping aside, it takes a rather alarming turn of action and becomes a troublesome obstacle for Chika and the participant.
Main Characters
In this chapter, the main characters serve as the examiners who present riddles and missions for the Guardian Archivist certification exam.
- [Marunouchi Line] Maru Shimochi
- [Ginza Line] Ginzaburo Shimochi
- [Fukutoshin Line] Fuku Miyako
- [Hibiya Line] Kengo Hibiya
- [Hanzomon Line] Hanzo Jimon
- [Yurakucho Line] Rara Arikita
- [Namboku Line] Minami Arikita
- [Chiyoda Line] Chiyo Yushima
- [Tozai Line] Sora Azuma
Metro Time Gate Official X (formerly Twitter): https://x.com/metro_timegate
Metro Time Gate Official Portal: https://metrotimegate.com/
Metro Time Gate Ruby Express Official Site: https://metrotimegate.com/v3
Event Details
Venue: Tokyo Subway Museum (6-3-1 Higashi-Kasai, Edogawa-ku, Tokyo)
Period: From Friday, June 26, 2026 (end date to be announced)
Available Hours: 10:00 AM – 5:00 PM (last admission at 4:30 PM)
- Closed on Mondays
- Subject to the Tokyo Subway Museum's regular operating hours
- If the experience is not completed by closing time, participants may return on another day
Tickets on Sale
Tickets go on sale from Monday, June 22, 2026. Stock is limited and early sellout is possible. Check the official site for the latest availability: https://metrotimegate.com/chikahaku
Experience Kit
Guardian Archivist Chapter
Price: 2,200 yen (tax included) / Duration: 120–180 minutes
An original tote bag is included as a special gift.
Note: Entry to the Tokyo Subway Museum is required and is not included in the kit price (adults 220 yen, children 100 yen; ages 4 and up through middle school).
Note: A bonus puzzle for participants who have completed the currently running Ruby Express (through September 30, 2026) is also included. Bring the boarding ticket item from that experience on the day.
Transportation to the museum is not included.
How to Participate
- Purchase an electronic ticket in advance through the official Metro Time Gate: Guardian Archivist site (https://metrotimegate.com/chikahaku).
- Select the redemption date, location, and quantity, then complete payment.
- Present the electronic ticket issued after payment at the museum shop on the designated date to receive the experience kit.
Note: Cancellations are generally not accepted after purchase. A handling fee will apply in cases where cancellation is unavoidable. Redemption locations and operating hours are subject to change.
Notes
- Entry to the Tokyo Subway Museum (adults 220 yen, children 100 yen; ages 4 and up through middle school) is required.
- Please be mindful of other museum visitors when solving puzzles.
- Station staff, crew members, and museum staff do not have hints or answers to the puzzles.
- A smartphone or tablet with the LINE app and an internet connection is required to enter answers.
- The content of this program is the same throughout the event period. Sharing puzzle questions, answers, or materials online, or reselling them, is strictly prohibited.
Organizers
Tokyo Metro Co., Ltd.
Kyujitsu Hack Co., Ltd.
