Overview (history, characteristics, attractions)
Irohazaka is the nickname for a mountain road in Nikko City, Tochigi Prefecture, that leads towards Lake Chuzenji and Oku-Nikko. It is a two-lane, one-way road (uphill and downhill lanes) that winds its way up a deep valley and steep slopes, and the road's former sharp curves gave it the name "Irohazaka" after the 48 characters of the "Iroha Song" (there are various theories). Since being developed as a tourist route, it has become particularly famous as a spot to view the autumn foliage, attracting many tourists with the colorful mountains and valleys that spread out below.
Historically, it was developed as an important road connecting the urban areas below with Oku-Nikko (Lake Chuzenji, Yumoto Onsen, etc.), and road improvements and one-way traffic have been implemented to improve transportation access. Currently, the new road (one-way in one direction) is used for tourist vehicles, and parts of the old road are popular as walking paths and observation spots.
Highlights
- Spectacular autumn foliage: Every year from late October to early November, the entire mountain is dyed in autumn leaves, and you can enjoy the gradation of colors at each curve of Irohazaka.
- Observation points: There are many viewpoints where you can see Lake Chuzenji and the distant mountains. The views of Akechidaira and the area around Lake Chuzenji are particularly popular.
- The atmosphere of old Irohazaka: There are still spots that give you a sense of history, such as stone monuments on the old road and signs showing the letters "Iroha" (some areas are walkable).
- Combining it with nearby tourist attractions: After climbing Irohazaka, you will find Lake Chuzenji, Kegon Falls (Kegon Falls), the trekking courses and hot springs of Nikko National Park, all of which can be explored in a day.
- Akechidaira Ropeway: You can take the ropeway to the Akechidaira Observatory, which offers a panoramic view of Lake Chuzenji and Kegon Falls, and enjoy the scenery in every season.
Access (nearest station, transportation, etc.)
- Nearest stations: JR Nikko Station and Tobu Nikko Station (both in the center of Nikko city).
- Bus: Tobu buses (depending on the route) depart from Nikko Station bound for Lake Chuzenji and Shobugahama, passing through Irohazaka. The travel time varies depending on road conditions, but you should expect it to take approximately 40 to 60 minutes from Nikko Station to Lake Chuzenji. Check the official website for the latest timetables and operating status.
- By car: Take the Tohoku Expressway, exit at Nikko IC or Imaichi IC, then take National Route 120 towards Lake Chuzenji. Please note that there is a one-way section on Irohazaka. The journey from Nikko city to the area around Lake Chuzenji takes approximately 20 to 30 minutes (depending on traffic conditions).
- Parking: Paid parking is available around the observation deck and tourist spots. However, it is often full during the autumn foliage season, so we recommend using public transportation or arriving early in the morning.
Estimated stay (estimated time required)
- Passing through only (enjoy the scenery while driving): 30 minutes to 1 hour
- Including photography at the observation deck and a short walk: 1-2 hours
- Set with sightseeing in the surrounding area such as Lake Chuzenji and Kegon Falls: Half a day to a full day (3 to 6 hours)
- If you plan to include hiking in Oku-Nikko and a stay at a hot spring: 1 night or more
Nearby spots
- Lake Chuzenji: A highland lake where you can enjoy boating and strolling along the lakeside.
- Kegon Falls (Kegon Falls): A powerful waterfall where the water of Lake Chuzenji falls in one go, and the view from the observation deck is popular.
- Akechidaira (Akechidaira Ropeway): From the observation deck you can get a panoramic view of Lake Chuzenji and Kegon Falls.
- Yumoto Onsen: A hot spring resort in Oku-Nikko, convenient for day trips and overnight stays.
- Nikko National Park trekking courses: Many nature observation and mountain climbing routes.
- Nikko Toshogu Shrine, Futarasan Shrine, etc. (Nikko city area): It is recommended to visit these places together with the historical buildings.
Things to be aware of (crowds, manners, seasonal precautions, etc.)
- Crowds: Traffic congestion and full parking lots can occur, especially during the autumn foliage season (usually from late October to early November). Weekends and public holidays are extremely crowded, so we recommend visiting early in the morning or using public transportation.
- Winter road conditions: Road closures and chain restrictions may be implemented due to snow accumulation and ice. If you are visiting in winter, be sure to prepare studless tires and chains and check the latest road information.
- One-way streets and large vehicles: Irohazaka has one-way streets and many areas where stopping on the shoulder is prohibited. Large buses and tourist buses pass through, so please drive safely and do not overtake or park on the street.
- Caution when walking: The old road and the walking path to the observation point have steep slopes and stairs, and can become slippery in rainy weather. Please wear comfortable walking shoes. There are some areas where it may be difficult to move around with a wheelchair or stroller.
- Nature conservation and etiquette: Always take your trash with you and avoid damaging nature and plants. The use of drones and other devices may be restricted in national parks and tourist areas, so please check in advance whether they are permitted.
- Ensure safety: The route has many curves, so fatigue and distraction are dangerous. Take breaks and do not push yourself too hard when driving for long periods of time or when visibility is poor.
Note: The time of year, road restrictions, bus schedules, etc. may change depending on the year and season. For the latest information, please check the official websites of Tochigi Prefecture, Nikko City, Tobu Bus, etc., as well as road traffic information in advance.
