Dejima — Siebold's Botanical Secret
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Dejima, NagasakiDejima — Siebold's Botanical Secret
📍 Dejima, Nagasaki·🕐 5h – 8h·📍 ~40-60 km en voiture
🚗+🚶Car & walking tour — single day
Also available as:HistoricalMysterySpy thrillerRomanceSupernatural

Dejima — Siebold's Botanical Secret

Uncover the forbidden botanical secrets smuggled by Philipp Franz von Siebold from Dejima. Decipher hidden codes in gardens and warehouses to expose his covert network before it's lost forever.

📱 1 to 10 phones · 1 team per phone · Independent codes

Difficulty
·From age 12 years
Starting point :Dejima Bridge

In 1823, German naturalist Philipp Franz von Siebold arrived at Dejima, Japan's isolated Dutch trading post in Nagasaki

8
sites to explore
~40-60 km en voiture
car + walking
5h – 8h
within the day
🚗+🚶
car recommended

Dejima — Siebold's Botanical Secret

🎭Your Mission

You are Philipp Franz von Siebold, a Dutch physician and naturalist, on a scientific and diplomatic mission to Dejima Island in 1823.

Your quest begins at Dejima Bridge (出

Discover Dejima, the artificial island of Nagasaki, the last bastion of an isolated Japan and a crucial point for European trade for 220 years.

The story that haunts this land

Your journey begins at Dejima Bridge (出島表門橋), the sole crossing point for authorized Europeans, built in 1636 under the Tokugawa Iemitsu shogunate. As Siebold, you cross this bridge, imagining the strict controls and curious gazes of Japanese officials. Dejima, this artificial island measuring 75m by 200m, served for 220 years, until 1859, as the only access for most Europeans to Japan. It was a place of intense trade, discreet espionage, and a cultural melting pot where the Dutch lived under constant surveillance, only a few dozen men at a time. This Nagasaki historical heritage is a testament to Sakoku, Japan's isolationist policy.

Continue to the reconstructed Dejima site, where period buildings like warehouses and merchant residences have been faithfully restored. Here, you discover the daily life of colonists and Japanese interpreters, as well as the trade that took place. It was here that Philipp Franz von Siebold, the Dutch physician you embody, established a private academy between 1823 and 1829 to teach Western medicine to the Japanese, thus contributing to Rangaku (Dutch studies). This Dejima reconstructed site 1998, open to the public, offers a concrete immersion into this period of limited but essential exchanges for Japan's scientific development.

The path then leads you to the Nagasaki History and Culture Museum (長崎歴史文化博物館), adjacent to Dejima. This museum, opened in 2005, houses precious artifacts from Dutch and Portuguese commercial history in Nagasaki. As Siebold, you would find documents and objects related to your own research and the dissemination of Western knowledge here. The museum's collection highlights the interactions between Dejima and Siebold, as well as the importance of Rangaku. This site is a key step to understanding Dejima's cultural and scientific impact on the Kyushu region.

Your exploration then takes you towards Olanda-zaka (坂オランダ), the 'Dutch Hill,' a sloping alley that was a historical passage for Japanese officials heading to Dejima. As you ascend this paved street, you can visualize the many scholars and interpreters who walked these same stones to meet Siebold. Further on, you catch sight of Oura Church (Oura Tenshudo), built in 1864. This first Catholic church in Japan symbolizes the end of Sakoku and the post-Perry opening, a striking contrast to the strict isolation of Dejima that you are exploring. The Siebold memorial Kyushu is thus marked by these places of memory.

Conclude your journey at the Siebold Memorial Museum (シーボルト記念館), opened in 1989, dedicated to the life and work of Philipp Franz von Siebold. Here you will discover his botanical and medical collection brought back from Dejima, testifying to his immense contribution to the knowledge of Japan. It is also here that the romantic story of Siebold and Sonogi (Taki Kusumoto), with whom he had a daughter, Ine, in 1827, takes on its full meaning. This circuit has allowed you to understand the importance of Dejima as Japan's only window to the West and the legacy of figures like Siebold in the development of Rangaku studies Dejima and Nagasaki's heritage.

1641
Beginning of Dejima's isolation for the Dutch East India Company (VOC).
1823
Arrival of Philipp Franz von Siebold in Dejima as a VOC physician.
1829
Siebold's expulsion from Japan for possession of illegal maps, known as the Siebold Incident.
Far more than an escape game

A game, a guided tour and a heritage guide — all in one

You're not just buying an escape game. You're carrying a living guide — historical anecdotes, forgotten legends, key monuments, hidden architecture — unfolding as you go.

🏛️
Hidden historical gems

At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.

📜
Anecdotes & legends

Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.

🏗️
Architecture & heritage

Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.

🚶‍♀️
Immersive wandering

Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.

🎙️
Immersive audio narration

A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.

📲
Yours forever

Keep access to the guide & game for 1 year. Come back any time, share it with friends.

« You will not leave this city the way you entered it. »

How does it work?

🏛️
Outdoor escape game

Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.

📱
On your smartphone

No app to download. Play directly from your browser. Guided step by step, at your own pace.

👨‍👩‍👧‍👦
Unlimited players

One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.

🎯
Augmented reality

Point your phone at the façade: a historical character appears and speaks to you in your language. Golden letters magically write themselves on the wall to reveal the puzzle answer.

🤖
AI that helps you

Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.

🗣️
32 languages

French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.

🎟️

Want to go deeper?

Places tied to your adventure — optional entries, totally up to you · per person

Nagasaki History and Culture Museumoptional
600¥. Explore permanent collections on Dutch and Portuguese trade history in Nagasaki, including Dejima artifacts and documents on Siebold.
Optionnel
/pers.
Siebold Memorial Museumoptional
100¥. Discover the life of Philipp Franz von Siebold through his botanical and medical collection brought back from Dejima, where he resided from 1823 to 1829.
Optionnel
/pers.
Castella Tastingoptional
500-1000¥. Savor Castella, a spongy cake of Portuguese origin introduced to Nagasaki in the 16th century, emblematic of Dejima's cultural exchanges.
Optionnel
/pers.
Visit Nagasaki Park (長崎公園)optional
Free access. Admire the memorial to the 26 Christian martyrs of 1597, visible from Dejima, and enjoy the historical botanical elements of the park.
Optionnel
/pers.
Budget if you do them all / pers.~0

The Route

8 sites to explore by car within the day

The gameplay: AR, camera, hidden clues

📱Search clues with your cameraRA

At each stop, open your phone camera: an augmented reality character appears on the façade and speaks your language. Hunt the clue — it materializes as golden letters on the real wall or floats in front of you. When you find it, the phone vibrates, an AR chest opens and reveals your answer fragment. 8 stops, 8 clues to find with the camera, 1 final code.

🎭

The stops on your route are a surprise. You'll discover them one by one, guided by your phone, starting from the meeting point.

8
original puzzles
24
min of narration
🪙 24
TripCoins granted
16
GPS waypoints

How does it work with a group?

One phone = one team. Pick the number at checkout (1 to 10).

🧍
1 phone

Solo, or a group sharing the screen. One team, one code.

👥
2-3 phones

Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.

👨‍👩‍👧‍👦
4 to 10 phones

Friends, bachelor/bachelorette, small office outing — each their own code, each plays at their own pace. Tiered pricing then €6 flat per phone from the 6th.

  • All codes are independent — play at the same time OR separately, each team advances at its own pace.
  • Leaderboard between your teams + global game leaderboard — each score appears in the public ranking.
  • More than 10 phones or need a personalized quest? Discover custom tours.
🕒No date to pick · Code valid 1 year · Play whenever you want

Ready to live this adventure?

Get my code · 14,90€

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🔒 Secure payment · Code in 5 min · Free cancellation

Practical info

Starting point
Dejima Bridge
Directions on Google Maps
🕐
Duration
2h – 2h30
Single-day
🚗
Transport
Car + walking
Car recommended
📍
Distance
~2.5 km drive
+ ~2 km on foot
👥
Players
Unlimited
From age 12
🌐
Languages
17 languages
Built-in translation

Why this route?

🌿

Secret Botany

Gather clues to reconstruct a hidden botanical register.

🔬

Scientific Espionage

Uncover Siebold's methods for collecting forbidden information.

📜

Forbidden Knowledge

Explore the themes of Rangaku and intellectual openness despite isolation.

Pierce the veil of isolation

Knowledge doesn't wait for permissions

★ Innovation 2026

9 features nobody else has

OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.

🎁

AR treasure chest

A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.

🧙

AR narrator character

Point your phone at the façade: a knight, witch, monk, sailor, detective or ghost appears full-screen and speaks to you in your language with their dedicated ElevenLabs voice (each character has their own unique voice) — your living guide.

📜

Magic golden letters

At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.

🎧

Written + audio narration

Every puzzle available as text AND voice-over: read at your own pace or listen eyes-free while walking. Great in groups and for accessibility.

🧭

360° radar + vibration

A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.

📸

Heritage storytelling

Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.

🤖

Progressive AI hints

3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.

🤳

AR selfie memento

At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.

📱

Zero app to install

PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.

Frequently asked questions

Q01Do I need to download an app?

No, never. You get a link, you click, it plays in your browser. That's the point of a PWA: same as an app, without the hassle.

Q02Does it work offline?

GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.

Q03How long does a game take?

1 h 30 to 2 h 30 depending on your pace. The timer runs but only for the leaderboard — you play at your own tempo.

Q04What happens if I'm stuck?

You get 3 levels of hints per puzzle (increasing penalty). If truly stuck, you can skip the step (45-min penalty but you keep going).

Q05What's the age range?

From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.

Q06What if my city isn't in the catalogue?

Pre-register or contact us — we'll email you as soon as your city is live.

Q07What is augmented reality exactly?

Point your phone at the façade: a historical character appears full-screen and speaks to you in your language. At the puzzle climax, golden letters magically write themselves on the real wall — that's your answer. After each puzzle solved, a treasure chest floats in front of you. Seeing is believing.

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Your turn to play

Discover Dejima, the artificial island of Nagasaki, the last bastion of an isolated Japan and a crucial point for European trade for 220 years.

14,90€
1 phone
28,60€
2 phones
41€
3 phones
52,20€
4 phones
62,10€
5 phones
69,50€
6 phones
77€
7 phones
84,40€
8 phones
91,90€
9 phones
99,30€
10 phones

1 purchase = 1 phone. Play several on the same device.

🕒No date to pick · Code valid 1 year · Play whenever you want
Get my code · 14,90€

No calendar booking. Code sent immediately by email.

🔒Secure payment · Code in 5 min · Free cancellation

🪙+24 TripCoins granted with your booking

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