Irohazaka Route

Irohazaka Route ties together Nikko’s inner city with Chuzenji Temple and Okunikko. The road has 48 curves in total, and is named after the Iroha-uta, a song used to remember the old Japanese alphabet (which had 48 characters).
At the top of the hill are Mount Nantai and Chuzanji Temple, and the two are popular destinations. From the bottom to the top of the hill is a 440-meter elevation difference, and from the mid-way observatory is a great view of Nikko.
Irohazaka Route is also a famous fall foliage spot in Nikko. The road can get congested, but it can give you an excuse to enjoy the fall leaves for a bit longer.