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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
In 1823, German naturalist Philipp Franz von Siebold arrived at Dejima, Japan's isolated Dutch trading post in Nagasaki
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.
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.
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.
At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.
Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.
Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.
Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.
A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.
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. »
Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.
No app to download. Play directly from your browser. Guided step by step, at your own pace.
One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.
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.
Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.
French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.
Places tied to your adventure — optional entries, totally up to you · per person
8 sites to explore by car within the day
The gameplay: AR, camera, hidden clues
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.
One phone = one team. Pick the number at checkout (1 to 10).
Solo, or a group sharing the screen. One team, one code.
Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.
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.
Ready to live this adventure?
Get my code · 14,90€No calendar booking. Code sent immediately by email.
🔒 Secure payment · Code in 5 min · Free cancellation
Gather clues to reconstruct a hidden botanical register.
Uncover Siebold's methods for collecting forbidden information.
Explore the themes of Rangaku and intellectual openness despite isolation.
Pierce the veil of isolation
Knowledge doesn't wait for permissions
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
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.
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
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.
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
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.
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
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.
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).
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Pre-register or contact us — we'll email you as soon as your city is live.
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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Discover Dejima, the artificial island of Nagasaki, the last bastion of an isolated Japan and a crucial point for European trade for 220 years.
1 purchase = 1 phone. Play several on the same device.
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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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
600¥. Explorez les collections permanentes sur l'histoire du commerce hollandais et portugais à Nagasaki, incluant des objets de Dejima et des documents sur Siebold.
100¥. Découvrez la vie de Philipp Franz von Siebold à travers sa collection botanique et médicale rapportée de Dejima, où il résida de 1823 à 1829.
500-1000¥. Savourez le Castella, un gâteau épongieux d'origine portugaise introduit à Nagasaki au XVIe siècle, emblématique des échanges culturels de Dejima.
Accès libre. Admirez le mémorial des 26 martyrs chrétiens de 1597, visibles depuis Dejima, et profitez des éléments botaniques historiques du parc.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.