【QuizKnock × Tokyo Metro】Explore the City on Your Own Course! Roaming Mystery Solving Game "Tokyo Metro Mystery Solving Guidebook: Gemstone Route Map" to be Held from Monday, April 27, 2026!
QuizKnock, operated by baton Inc., and Tokyo Metro will collaborate to hold the roaming mystery-solving game "Tokyo Metro Mystery Solving Guidebook: Gemstone Route Map" from April 27 to July 31, 2026. Participants will purchase a kit and explore the city on their own customized course using a smartphone.
📋 Article Processing Timeline
- 📰 Published: April 14, 2026 at 23:00
- 🔍 Collected: April 14, 2026 at 14:31
- 🤖 AI Analyzed: April 19, 2026 at 16:23 (121h 51m after Collected)
QuizKnock, operated by baton Inc. (Shinagawa-ku, Tokyo; Representative Director Yosuke Kikawa), will collaborate with Tokyo Metro Co., Ltd. (Taito-ku, Tokyo; President Akihiro Kosaka; hereinafter "Tokyo Metro") to hold the "Tokyo Metro Mystery Solving Guidebook: Gemstone Route Map." The event period will be from Monday, April 27, 2026, to Friday, July 31, 2026.
"Tokyo Metro Mystery Solving Guidebook: Gemstone Route Map" is a roaming mystery-solving game where participants challenge various puzzles hidden in Tokyo Metro stations and along the railway lines, aiming for the final goal. After purchasing a kit at a sales store, participants can challenge the puzzles at their own pace while walking through the city. There are also scenes where participants can freely choose their destination, allowing them to enjoy building their own unique course.
The production was handled by QuizKnock's mystery-solving production team, NazoLock. Unravel a variety of rich puzzles with your brilliant ideas!
Click here for the special website! >>> https://nazoguidebookmetro.quizknock.com/
This mystery-solving collaboration between QuizKnock and Tokyo Metro is the second of its kind, following last year's "Mystery Solving Underground Playground."
QuizKnock × Tokyo Metro "Tokyo Metro Mystery Solving Guidebook: Gemstone Route Map" Event Outline
■ Story
In the city of Tokyo, a brilliance unknown to anyone still sleeps.
It is said that in this world, there is a phantom substance that appears in response to people's flashes of inspiration.
Together with an eccentric doctor who pursues this substance, you embark on an unknown investigation.
Gather all the flashes of inspiration in Tokyo and find the ultimate treasure!
■ Event Period
Monday, April 27, 2026, to Friday, July 31, 2026
* Business hours and closing days of facilities appearing in the mystery game are subject to each facility.
■ How to Play (Participation Method)
(1) Purchase a mystery-solving kit at a sales store.
(2) Start the mystery game from your favorite station.
(3) Enter your answers on the game website.
(4) Repeat solving puzzles by choosing the next station (spot) to visit, touring all over Tokyo.
(5) Clear the game by solving the final mystery!
■ What You Need
・A smartphone with internet access
* Please ensure your smartphone has sufficient battery life.
* Communication fees are the responsibility of the customer.
■ Estimated Time Required
・For experienced puzzle solvers: 5 hours~
・For beginner puzzle solvers: 7 hours~
・No time limit
* This is the time required only for solving puzzles and moving.
■ Number of Participants
No limit
* There is no limit to the number of people who can play simultaneously. However, if multiple people play together, you must purchase a mystery-solving kit for each person.
■ Sales Stores
(1) HMV (HMV&BOOKS SHIBUYA, HMV&BOOKS SPOT SHINJUKU, HMV Esola Ikebukuro, HMV LaLaport Toyosu)
* Sales at HMV&BOOKS SHIBUYA will start from Saturday, April 25. Play will start from Monday, April 27.
(2) Hontas Tameike (Tameike-Sanno Metropia store)
(3) Bunkitsu (Roppongi)
(4) Ogaki Bookstore (Azabudai Hills store)
* Sales hours are subject to the business hours of each sales store.
★ The convenient "Tokyo Metro 24-hour Ticket" is recommended for participation!
・Price: Adults 700 yen, Children 350 yen
・Validity: All Tokyo Metro lines
* For details on various one-day tickets, please check the Tokyo Metro website.
https://www.tokyometro.jp/ticket/value/1day/index.html
About QuizKnock
QuizKnock is a media platform operated by quiz king Takuji Izawa, which fuses entertainment and knowledge. Based on the concept of "learning that starts with fun," they daily disseminate articles and videos that serve as an opportunity to "know" something. Their YouTube channel (https://www.youtube.com/c/QuizKnock) has surpassed 2.6 million subscribers. They are currently developing the "QuizKnock 10th Anniversary Project" towards their 10th anniversary on October 2, 2026.
"Tokyo Metro Mystery Solving Guidebook: Gemstone Route Map" is a roaming mystery-solving game where participants challenge various puzzles hidden in Tokyo Metro stations and along the railway lines, aiming for the final goal. After purchasing a kit at a sales store, participants can challenge the puzzles at their own pace while walking through the city. There are also scenes where participants can freely choose their destination, allowing them to enjoy building their own unique course.
The production was handled by QuizKnock's mystery-solving production team, NazoLock. Unravel a variety of rich puzzles with your brilliant ideas!
Click here for the special website! >>> https://nazoguidebookmetro.quizknock.com/
This mystery-solving collaboration between QuizKnock and Tokyo Metro is the second of its kind, following last year's "Mystery Solving Underground Playground."
QuizKnock × Tokyo Metro "Tokyo Metro Mystery Solving Guidebook: Gemstone Route Map" Event Outline
■ Story
In the city of Tokyo, a brilliance unknown to anyone still sleeps.
It is said that in this world, there is a phantom substance that appears in response to people's flashes of inspiration.
Together with an eccentric doctor who pursues this substance, you embark on an unknown investigation.
Gather all the flashes of inspiration in Tokyo and find the ultimate treasure!
■ Event Period
Monday, April 27, 2026, to Friday, July 31, 2026
* Business hours and closing days of facilities appearing in the mystery game are subject to each facility.
■ How to Play (Participation Method)
(1) Purchase a mystery-solving kit at a sales store.
(2) Start the mystery game from your favorite station.
(3) Enter your answers on the game website.
(4) Repeat solving puzzles by choosing the next station (spot) to visit, touring all over Tokyo.
(5) Clear the game by solving the final mystery!
■ What You Need
・A smartphone with internet access
* Please ensure your smartphone has sufficient battery life.
* Communication fees are the responsibility of the customer.
■ Estimated Time Required
・For experienced puzzle solvers: 5 hours~
・For beginner puzzle solvers: 7 hours~
・No time limit
* This is the time required only for solving puzzles and moving.
■ Number of Participants
No limit
* There is no limit to the number of people who can play simultaneously. However, if multiple people play together, you must purchase a mystery-solving kit for each person.
■ Sales Stores
(1) HMV (HMV&BOOKS SHIBUYA, HMV&BOOKS SPOT SHINJUKU, HMV Esola Ikebukuro, HMV LaLaport Toyosu)
* Sales at HMV&BOOKS SHIBUYA will start from Saturday, April 25. Play will start from Monday, April 27.
(2) Hontas Tameike (Tameike-Sanno Metropia store)
(3) Bunkitsu (Roppongi)
(4) Ogaki Bookstore (Azabudai Hills store)
* Sales hours are subject to the business hours of each sales store.
★ The convenient "Tokyo Metro 24-hour Ticket" is recommended for participation!
・Price: Adults 700 yen, Children 350 yen
・Validity: All Tokyo Metro lines
* For details on various one-day tickets, please check the Tokyo Metro website.
https://www.tokyometro.jp/ticket/value/1day/index.html
About QuizKnock
QuizKnock is a media platform operated by quiz king Takuji Izawa, which fuses entertainment and knowledge. Based on the concept of "learning that starts with fun," they daily disseminate articles and videos that serve as an opportunity to "know" something. Their YouTube channel (https://www.youtube.com/c/QuizKnock) has surpassed 2.6 million subscribers. They are currently developing the "QuizKnock 10th Anniversary Project" towards their 10th anniversary on October 2, 2026.