Castle Monster Solve a mystery at Shimabara Castle at night

Escape from Shimabara Castle at night!

What is “Riddle-Solving Castle Escape Game”?

Answer the riddles one after another and meet the giant Lord (shadow picture) who sits on the top floor of the castle tower! The game will be played using the free smartphone app “LINE”. Let’s aim for the top floor by answering the LINE (Four Heavenly Kings)! The original BGM and original characters will draw you into the world of Castle Monster.

The story of a family that has Shimabara Castle as its stronghold

This is Shimabara Castle at night.
You notice that the doors to the castle keep, which are normally closed, are open. You are tempted to sneak in, so you enter the castle keep.

Immediately thereafter!

Suddenly feeling uneasy, you try to go out, but a mysterious force pushes you back in.

“Oh well. The night is our domain, and yet another human has wandered in?”
You looked in the direction of the voice and saw the old butler.

“I am the butler of the demon family that has this place as its stronghold. Unfortunately, you are trapped. If you want to get out of here, you must complete the devil’s game. You don’t have a choice, you know. Now, you’re going to have to keep us company! We, the Castle Monster clan, will play a game of riddles…”

Without knowing why, you were caught up in the devils’ unreasonable game. Will you be able to solve all the riddles and escape from the castle tower?

Huge shadow puppets over the Ariake Sea!

On the day of the event, Shimabara Castle will be lit up and a giant shadow puppet will appear over the Ariake Sea!
This is the Castle Monster!
Many people were so amazed that they could not close their mouths when they saw the real thing!

Cooperation in the production of the mystery

There are two types of riddles. *Please see the information at the bottom of the page for the schedule.

  • “WASURENNNA Disease ver.” Kyushu University Puzzle Solving Project “Quest
  • “Devil’s Party ver.” Tokyo Gakugei University Puzzle Solving Circle “Rätsel”

Download the flyer(4.43MB)


  • 5/6 (Sat) “Devil’s Party ver.”
  • 9/16 (Sat) “Devil’s Party ver.”
  • 11/25 (Sat) “WASURENNNA Disease ver.”
  • 2024/3/30 (Sat) “WASURENNNA Disease ver.”

19:00 – 22:00 (Last entry at 19:30)

  • Advance sale 1,700 yen (tax included)
  • At the door 2,000 yen (tax included)

Free for preschool children
For reservations, please call or visit our reservation website.
Click here for the reservation site.


Show Shimabara Megurin ticket to get 1,700 yen instead of 2,000 yen for the day of the event.

Participation Limit

Limited to 100 people each time


Inside Shimabara Castle Keep

Time required

1 hour 30 minutes ~ 2 hours 30 minutes
*There are individual differences.


Shimabara Tourism Bureau Inc.

Other Remarks


*The difficulty level of the puzzle is high, but we have prepared plenty of hints, we will provide plenty of hints so that even first-time players can enjoy the puzzles.