Irohazaka is a pair of winding roads (ascending and descending) connecting Nikko-city and the mountainous Lake Chuzenji area. The roads are named after the 48 syllables of the Japanese alphabet (kana) as they contain 48 hairpin turns while rising and falling 440 metres in elevation. The best viewing spot is the Akechidaira observatory on the descending road. The picturesque landscape is known as the most beautiful place to celebrate autumn leaves in Nikko， and it is well worth putting up with the traffic on the roads at this popular time.

Kegon falls, one of the 3 great waterfalls in Japan, lights up in the evening. Let’s enjoy the rich and plentiful nature, and the magnificent lit up Kegon falls. *This illumination event can be canceled when bad weather is expected, or ill effects on wild animals are concerned. *When it is crowded，please be kind to other people :) *Using tripod is prohibited. *Please bring foot light for dark path walking.

Kegon Falls is the most famous of Nikko’s 48 waterfalls. Water from Lake Chuzenji falls 97 metres straight down to the rocks below creating a dynamic and artistic work of nature. A special lift takes visitors to the basin where the force and roar of the water can be witnessed close up! Kegon Falls offers stunning views every season. Deep green in early summer, red and yellow leaves in autumn. in winter, the water freezes as it drops creating beautiful ice shapes almost like beautiful pieces of art.

The Tochigi Prefectural Nikko Natural History Museum, adjacent to the Oku-Nikko Information Center, provides up-to-date nature information, tourist information for Oku-Nikko, and various other guidance. The museum offers multilingual support in English, Chinese, Korean, and Thai. A highlight is the "Nature Exhibition Room," where visitors can feel immersed themselves in the breathtaking natural beauty of Oku-Nikko through state-of-the-art digital displays. Enjoy the breathtaking view of Oku Nikko's natural landscape on our large screens, featuring flowing waters and wetlands, and the creatures that inhabit them. In the forest diorama, you can experience a virtual nature observation using AR content on tablets, exploring various animal field signs and their ecology. Our humanities exhibit introduces the spiritual significance of Oku-Nikko and its history as a popular international summer resort since the early Showa period. Additionally, we offer a range of nature experience activities such as bicycle rentals and guided nature tours.

Nikko Natural Science Museum offers self-guided cycling tours that allow you to fully immerse yourself in the natural beauty of Oku-Nikko. Riding an electric assist bicycle (e-bike) and using an exclusively designed navigation device, you can explore pre-planned routes for each tour. While there are no guides, you can enjoy cycling privately with your family or friends. This option is recommended for those who prefer to explore freely, including stops for dining and shopping.   We offer a variety of routes including cafe hopping, exploring the history of Nikko, cycling on quiet paved forest roads closed to general traffic, and even hiking. Our e-bikes make hill climbing effortless. If you're visiting Oku-Nikko, be sure to join us! *Please note that departure and arrival points vary depending on the tour. Tours depart from both "Nikko Natural Science Museum" and "Akanuma Nature Information Center", so please be sure to check your designated meeting point.