A super authentic mystery solving game in the park! Soleil Story

KAGENAZO", a creative group for solving local community-activated riddles, has seriously created this event, which is the largest riddle-solving event in the history of Soleil Hill! Can you successfully complete the biggest riddle in the history of Soleil Hill?

summary

My name is Haruto. I came to Soleil Hill for a seaside school.

I was born weak and cannot run around or play in a boat like everyone else.
Everyone else was free to go, but I was told to wait here alone.

I'm used to it because it's what I always do, but I'm bored...
I looked down at my feet and saw an envelope. Inside was a letter.

Nice to meet you. My name is Natsumi. Please call me Nacchan.
I was born weak and have been in the hospital for a long time.
If anyone picks up this letter, please solve the riddle and send me the answer."

A letter is a turning point of destiny. A story of Soleil connected by a "mystery".

Event Details

Ticket sales will begin at 12:00 on December 24, 2025.
Time required: 180 minutes You can also enjoy the attractions and restaurants in the park while solving the riddles. (Not included in the ticket).
Participation fee] 2,750 yen
Recommended age] 9 years old and up
What to prepare: Smartphones and tablet terminals with camera functions and the ability to read two-dimensional codes.
*Use the official LINE account.
*Web communication charges are to be borne by the customer.
*Please be careful not to run out of battery power when using this product.
Note: Staff will exchange your ticket for a mystery kit when you arrive at the park. There are three exchange locations: Entrance Office, Nagai Base, and GOGO Cart Reception.

Trailer House Mystery, an interactive trailer house stay experience, begins Sunday, March 1, 2026.Oh my god!!!

The experience of staying in a trailer house draws the visitor into a story about a family, triggered by a single piece of mystery. The space in front of them, the clues left behind, and the memories of the family---these are just a few of the many stories that are told.

As participants solve the riddles, they will unravel the secrets hidden in the story. The time spent in this nature-rich location itself becomes a story, creating a new value to the lodging experience.

Under the theme of "an entertainment park where everyone can play and have fun 365 days a year," Soleil Hill continues to enhance the value of nature, experiences, and stays. In this project, we have created a new lodging experience that utilizes our expertise in creative puzzle solving, with the aim of extending the length of stay, creating shared experiences for families and groups, and revitalizing the local community through entertainment.
It is being developed as an accommodation facility where visitors can enjoy stay-and-go experiences, including "ocean cabins" set in locations overlooking the ocean and "forest cabins" surrounded by nature.

Overview of the event

Contents】：Trailer House Mystery
Start date]: March 1, 2026 (Sunday)
Sales price]: Free of charge (accommodation fee for the trailer house is not included)
Experience Time】:Approx. 1 hour
Location: "Nagai Umine no Koen Soleil no Oka" Trailer House Area (4 Nagai, Yokosuka City, Kanagawa Prefecture)
Experience format]: Experiential riddle-solving contents for guests (A4 paper riddle-solving kit)

How to experience】:①Booking a trailer house stay from the official Soleil Hill website.

　　　　　　 Receive Trailer House Mystery at the reception desk on the day of your stay!

　　　　　　 (3) Try to solve the riddle in an actual trailer house!

▼ Main Facilities

Check-in】：13:00〜17:00
Check-out time: 10:00
Rooms: Tatami-mat specifications, air-conditioning available
Ocean cabins: 12 total (approx. 13 m2)
Forest Cabin: 8 rooms (approx. 19 m2 / dog-friendly)
Approximate fee: 18,700 yen (tax included) and up (varies by facility)
By combining the experience of staying in nature with this "Trailer House Mystery," the stay itself will be transformed into a narrative experience.

▼ Trailer House ReservationsReservations can be made through the official website.
Trailer Cabin Reservation Page (official)

Mystery planning/production

KAGENAZO (Operated by FUN SPIRITS Corporation)

Producer & Scriptwriter: Kagero

Soleil SORY is fully produced by KAGENAZO's representative, Kage-taro, who is a member of KAGENAZO, a creative team for solving mysteries that are currently gaining popularity in the region!
Let's try to solve the Soleil riddle that KAGENAZO has seriously produced!

↓Click here to see the location scouting for the mystery production.