Guida
Iroha Zaka is a section of National Route 120 that connects Umagari in Nikko City, Tochigi Prefecture, to the shores of Lake Chuzenji. Its most striking feature is the continuous series of hairpin curves. The road is named after the traditional Japanese phonetic order, as it was once said to have 48 curves, and even today, signboards featuring characters from the 'Iroha' alphabet are placed at each curve. The route consists of two distinct paths: the 'Second Iroha Zaka' for ascending the mountain and the 'First Iroha Zaka' for descending, offering a dynamic driving experience that follows the dramatic mountain topography.
While this route once functioned as a toll road, it is now a free public road open to all. This route has long been a beloved path for travelers heading toward Lake Chuzenji, utilizing the rich natural landscape of Nikko. The unique system where each curve is assigned a character from the 'Iroha'—the traditional Japanese alphabetical order—serves as a fascinating cultural element that adds a sense of discovery to your journey.
The greatest charm of Iroha Zaka is the ever-changing scenery as you drive. Because the ascent and descent routes offer different perspectives, the views are never the same. There are several rest areas and parking lots equipped for travelers to stop and soak in the surrounding nature. A delightful way to experience the road is to look for the character signboards at each curve. The shifting colors of the seasons, from vibrant greens to deep reds, make every drive a unique and visually stunning experience.
Iroha Zaka presents a completely different face depending on the season. In spring, the mountains are draped in fresh, vibrant greenery, perfect for feeling the refreshing breeze of early summer. The autumn foliage season is arguably the most beautiful time to visit; driving through a tunnel of red and yellow leaves is an extraordinary experience. However, because it becomes extremely crowded during the peak autumn season, we highly recommend traveling in the early morning. Also, be aware that fog can frequently occur depending on the weather, which may affect visibility.
The primary way to experience this area is via car, bus, or sightseeing coach. Driving a rental car or your own vehicle is highly popular as it allows you to enjoy the scenery at your own pace. If you prefer public transportation, routes such as the Tobu Bus run frequently, providing smooth access from the Nikko Station area. Whether you are driving or riding a bus, the view from the window offers a profound way to experience the grand scale of Nikko's nature with all your senses.
Once you complete the climb up Iroha Zaka, you will arrive at iconic scenic spots such as Lake Chuzenji and Kegon Falls, which are among the most famous landmarks in Nikko. This road serves as the vital artery for reaching these destinations, allowing you to feel integrated with the natural environment as you move toward the heart of the mountains.
As most visitors travel by car or bus, please wear comfortable clothing suitable for movement. Bringing seasonal layers (especially for autumn and winter) is essential. Please note that you may encounter wild Japanese macaques (monkeys) in the area; feeding wildlife is strictly prohibited. When using parking lots, it is helpful to have cash ready for any fees. While there is some English signage, please observe standard Japanese traffic rules and mountain driving etiquette.