When travelers visit Japan, the most memorable experiences don’t always happen at famous tourist destinations or Michelin-starred restaurants. Instead, the most profound moments happen through unexpected cultural encounters. Furthermore, these intimate experiences create connections that transcend language barriers.
Have you ever heard of “Nerunerunerune,” a unique Japanese DIY candy? Recently, at The RYOKAN O in Nakatsugawa, we had the pleasure of introducing this fascinating treat to a delightful couple visiting from Spain.

As the white powder gradually transformed into a colorful, fizzy treat before their eyes, our Spanish guests watched in amazement. “Magic…!” exclaimed one partner. Meanwhile, the other smiled and replied, “This is science!” As a result, this small experience, filled with surprise and laughter, became a moment that allowed them to feel the true spirit of Japan. Moreover, this authentic experience can’t be found in any guidebook.
At our inn, we believe that these spontaneous moments of cultural connection are what transform a simple stay into an unforgettable journey. Therefore, our approach to hospitality goes beyond providing comfortable accommodations. Instead, we strive to create opportunities for genuine cultural exchange and personal discovery.
The Magic of “Nerunerunerune” – Japan’s Wonder Candy
What Makes This Candy Extraordinary
“Nerunerunerune” is a DIY candy that has been beloved in Japan for generations. Specifically, this DIY candy creates a chemical reaction by mixing water with white powder. Then, as you stir, it bubbles up and transforms into colorful candy. Consequently, the process looks just like magic. Additionally, Japanese children learn about chemical reactions in a fun and delicious way through this candy.

The Science Behind the Magic
The magic happens through a simple pH reaction – as you add water and mix the powder, chemical indicators create the spectacular color change while generating effervescence.
Key Features That Delight Visitors
- Simple preparation requiring only water
- Dramatic color-changing reaction (blue to pink)
- Fizzy, sweet-and-sour grape flavor
- Safe, edible ingredients designed for children
- Interactive experience that engages multiple senses
Why Foreign Visitors Are Captivated
For international visitors, particularly from Western countries, the concept of DIY candy that undergoes such dramatic transformations is entirely novel. For example, the Spanish couple’s reaction perfectly illustrates this fascination. Specifically, they oscillated between viewing it as “magic” and recognizing it as “science.”

Outside of Japan, there are very few confections that allow you to learn while having fun, making this a uniquely Japanese cultural experience.
Our Inn – Where Cultural Magic Happens
A Perfect Setting for Discovery
Location and Accessibility
Located just a 2-minute walk from Nakatsugawa Station, our inn represents the perfect fusion of historical authenticity and contemporary hospitality. Furthermore, this beautifully renovated 120-year-old traditional inn is a place where you can experience Japanese culture intimately and deeply.
The Art of Intimate Cultural Exchange
Our inn’s greatest charm is the very close relationship between guests and staff. Here, heartwarming exchanges naturally develop as if you were family or old friends. Like today’s “Nerunerunerune” experience, special memories can be created from casual conversations, making this the perfect inn for those who value human connections beyond just accommodation.
We aim to be the kind of place where guests leave thinking, “What an interesting inn that was! We were so lucky to learn so much!” Please feel free to ask us about anything that interests you.
Cultural Exchange at Our Inn
Every Question is an Opportunity
“What is this?” “How does it work?” “Why does it change color?” – every question our guests ask becomes a precious opportunity to share Japanese culture. We’ve learned that small curiosities can become the trigger for experiencing Japanese culture.
Our staff approach these moments not as interruptions to routine service, but as the very heart of what makes staying at our inn special.
Conclusion – Where Every Moment Becomes Magic
At our inn, we also offer tours that allow you to experience the historical significance of the Nakasendo (Samurai Road). Additionally, on our Instagram, we share numerous videos showcasing the heartwarming interactions we have with our guests. Please take a look and see for yourself the magical moments that happen here.
Whether you’re driven by curiosity about Japanese culture, eager to explore traditional post town history, or simply seeking authentic human connections, please come visit our inn. Ultimately, your own “Magic…!” moment is waiting to unfold.














