Hotel tour-type mystery historia

Concept

A new historical mystery begins in the hotel building that reproduces Kitaoumi. You become Hidenaga, and together with Hideyoshi and Sakichi Ishida, on a journey to pursue the secret treasures of the Asai family. Every time you follow clues and unravel the mystery, the culture and signs of the Sengoku rise up in front of you...
Please experience an immersive mystery solving activity that “walks and tastes” history.

Story

Warring States period: Oomi Province
After a long battle, Nobunaga Oda finally defeated his enemy Nagamasa Asai, gave Hideyoshi Hashiba, who made achievements in this battle, the former territory of the Asai family.
Hideyoshi and his younger brother Ichiro Ko (later Hidenaga) created a new town in Nagahama and worked hard day and night as a new castle owner.
One day, Hideyoshi, who was worried about money policy, hears rumors in the castle town that the Asai family's legacy is still sleeping.
There, a smart boy, Sakichi Ishida (later Mitsunari), came to report saying, "I have found a hidden letter of Nagamasa Asai."
The letter may contain the secret treasures of the Asai family.……？
You become a small Ichiro, traveling around Kitaoumi with Hideyoshi and Sakichi to search for hidden treasures of the Asai family.……

Overview

Period of the event: December 26, 2025 (Friday) to full year

Time required: Approximately 30 to 60 minutes

Method of participation: Please check the posters and flyers in the lobby and the hotel.

Fees: Included in all-inclusive

Target age: 5 years old or older

Reservations: Not required

How to play 3 STEP

Download the dedicated app from the QR code and start the activity!
There is a QR code in a place that looks like a scenic spot in each region, and when you read it, mystery related to scenic spots and stories is developed.
In accordance with the story, we will go around the museum and unravel all mysteries.
Please join us in solving the mystery where you can learn about the history of the land.

QR code reading
Hiding in the hotel
Let's find a mystery solving spot!
Solve the mystery,
Let's proceed with the story!

Information on smartphone special page and app download

See the special page

Notes

・It will be an activity for guests only. (No reservation required)
・The content, provision period, and provision time may change depending on the situation. (There are closed days, excluded days, etc.)
・This is an experience using the Internet environment and smartphones and tablets.
・Customer's own communication fee may be charged.
・Please give consideration to other customers during the experience.

Producers and partners

Planning and production: RiddleUP, Production Cooperation: ASATEC Corporation
Supported by: Nagahama City Board of Education, Kitaoumi Toyotomi Exposition Executive Committee

If you haven't made a reservation, click here

Grand Mercure Lake Biwa Resort & Spa is an all-inclusive that includes dinner, breakfast, drinks and snacks in the lounge, hot springs and activities. You can enjoy dinner and breakfast that make use of seasonal ingredients, as well as free drinks in the lounge.
Please make a reservation with your favorite plan and enjoy the mystery historia experience around the hotel freely.