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View of Lake Chuzenji and Mount Nantai from the Hangetsuyama Observation Deck

Hangetsuyama (半月山) is a mountain at the southeastern corner of Lake Chuzenji. Hiking trails lead up to the top of the mountain, around where there is an observation deck with great views onto Lake Chuzenji and Mount Nantai. From about mid October to early November each year, autumn colors add to the scenery viewed from here, making this a popular autumn leaf viewing spot.

Visitors who do not wish to climb the full height of the mountain can take a bus, taxi or rental car up a winding road that ends at the parking lot located about three quarters up the mountain. From there it takes approximately 30 minutes to ascend to the observation deck near the summit along a steep nature trail. Proper hiking shoes are recommended.

The road up Hangetsuyama, known as the Chuzenjiko Skyline, is a former toll road that was specially built for tourism and is free to use for visitors today. The road passes by the Chuzenjiko Observation Deck along the way, which provides nice views of Lake Chuzenji from a different vantage point. Located right along the road, this observation point is easier to access, but offers somewhat less unobstructed views of the lake below. The Chuzenjiko Skyline is closed during winter from around late November to around mid April.

View from the Chuzenjiko Observation Deck along the road


Outside of winter, hourly buses travel between Chuzenjiko Onsen and the Hangetsuyama Parking Lot (20 minutes, 520 yen one way), stopping at the Chuzenjiko Observation Deck (15 minutes) along the way.

How to get to and around Nikko

Hotels around Nikko

Recommended Hotels
Chuzenjiko Kanaya Hotel
Upscale mountain lodge style hotel in rustic log cabin buildings set in the forest.
Agoda Japanican Booking
Nikko Kanaya Hotel
This historic hotel was one of the first Western style hotels in Japan. It is conveniently located across the street from the temples and shrines of Nikko.
Agoda Japanican Booking
Turtle Inn Nikko
Inexpensive inn popular among foreign tourists, conveniently located 15 minutes walk from Nikko's temples and shrines.
Agoda Booking

Tours and Travel Services

Page last updated: January 12, 2016