A mysterious experience attraction guided by stones
Najav and the Mysterious Pebble (April 24 - August 30)
The mysterious stone "echorb" that attracted attention at the Osaka-Kansai Expo is now available.
Coming to Ikebukuro NAMJATOWN!
Attraction details
"Najav and the Mysterious Stone" is a town-exploration mystery-solving attraction where Najav's grandfather, Najaji, is guided by the mysterious stone "echorb" that he and the wizard Murata discovered long ago, and participants gather clues and deduce keywords by visiting points around the park.
■ Story ■
NAMJATOWN 's mascot character, Najavu, had a grandfather named Najaji.
One day, among the treasure collection left behind by Najaji, they found a letter addressed to Najavu, along with a pebble that shone with a strange color.
According to the letter, long ago, when his wizard friends Murata and Najaji were excavating ruins, they discovered a "mysterious stone" with strange powers.
Apparently, that pebble possessed a hidden power, which was used to hide a precious treasure somewhere in NAMJATOWN!
However, in order to reach the hidden treasure, you must face several trials while being guided by the power of the pebbles.
"Where exactly is the treasure?"
Najavu couldn't stop thinking about it, so he entrusted the "mysterious stone" to a Festarian* and asked him to search for the treasure.
Now, follow the guidance of the pebbles, overcome the trials, and find the hidden treasure!
*At NAMJATOWN, customers are referred to as "Festarians".
Event overview
[Event Period] April 24th (Fri) - August 30th (Sun), 2026
[Venue] Fukubukuro 7th Street Shopping Arcade inside NAMJATOWN
[Price] Passport (NAMJA Passport/Night Passport) or 6 NAMJA Coins (1,200 yen)
*If using NAMJA Coins, a separate admission fee will be required.
[Number of participants] 1 to 3 people per group
[Duration] Approximately 20 minutes per group
Attraction Information
| price | Travel time | Genre | passport | Club NAMJA |
|---|---|---|---|---|
| 1,200 yen (120 NAMJA) 
|
Approximately 20 minutes | A town exploration mystery-solving attraction | ○ | - |
| Height Limit | hug | Piggyback | Accompanying | stroller |
|---|---|---|---|---|
| ー | - | △ | Children under elementary school age must be accompanied by a person aged 13 or over. | △ |
Children under 4 years old are not permitted to use this service.
Children under elementary school age must be accompanied by an adult aged 13 or older.
Wheelchair users are only permitted if accompanied by a person aged 13 or older.
Please note that you will be guided through one of the two designated courses.
• Individuals with visual or hearing impairments may only use the service if accompanied by a caregiver aged 13 or older.
Depending on the severity of the disability, individuals with limited use of their hands may require an accompanying adult aged 13 or older.
• Individuals with limited leg mobility you can use the facilities alone if you are able to walk independently. However, depending on the severity of your disability, you may need an accompanying person aged 13 or older.
- Participation is not permitted while holding a child.
- Carrying your baby on your back is only permitted if you are using a baby carrier.
- Children being carried on someone's back are not permitted to hold items while using the product.
If you are participating as a group, you can borrow up to three items at a time.
If you wish to use four or more devices, please divide into groups.
Please note that each group will be assigned to a different course.
・You must keep both hands free while using the facilities, so please use the lockers or umbrella stand near the information counter for large luggage and umbrellas.
Please refrain from using smartphones or mobile phones while participating in the attraction.
- Photography is permitted only for accompanying persons who do not have their own items, however, there are some areas where photography is prohibited.
You cannot choose the course you will be using.
Depending on the time of day and the number of participants, you may not be able to participate in the experience.
Please refrain from eating, drinking, or using the restroom while experiencing the attraction.
Please follow the instructions of the staff if you are participating.
・Please check here for restrictions on use of other attractions.
・For information regarding the use of attractions by people with disabilities, please see here.
What is the mysterious stone "echorb"?
"echorb," developed by Murata Manufacturing Co., Ltd. and Miraisense Co., Ltd., is a tactile device that incorporates a variety of Murata's unique technologies, including 3D haptics, the world's first technology that creates the illusion of being pulled through special vibrations.
At "Better Co-Being," one of the signature pavilions for the 2025 Osaka-Kansai World Expo, we provided an immersive, tactile resonance experience.
