Backside of Nikko

...It is divided into Oku-Nikko upstream of Kegon Falls and Omote-Nikko (Kuchi-Nikko) downstream. The area north of the Nikko volcanic group, Kuriyama Village in Shioya County upstream of the Kinu River, is sometimes called Ura-Nikko (Oku-Kinu), and the area from the southern part of Nikko City to the northwestern part of Kanuma City and the northern part of the Ashio Mountains including the eastern part of Ashio Town, is sometimes called Mae-Nikko. Omote, Oku and Ura-Nikko are included in Nikko National Park, and Mae-Nikko is designated as a prefectural natural park.

*Some of the terminology explanations that refer to "Ura Nikko" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…華厳滝より上流の奥日光，下流の表日光(口日光)に分けられる。また，日光火山群の北，鬼怒川上流の塩谷郡栗山村を裏日光(奥鬼怒)，日光市南部から鹿沼市北西部，足尾町東部を含む足尾山地北部を，前日光と呼ぶこともある。表･奥･裏日光は日光国立公園に含まれ，前日光は県立自然公園に指定されている。…

※「裏日光」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報