North Yatsugatake

...In the narrow sense, it refers to the mountain range that stretches from north to south with the main peak Akadake (2,899m) at its center, including Nishidake, Amigasayama, Gongendake, Amidadake, Yokodake, Iodake, and Minenomatsume. In recent years, these have been grouped together as Minami-Yatsugatake, and the mountains north of Natsuzawa Pass, such as Neishidake, Tengudake, Nakayama, Shimagareyama, and Yokodake, are referred to as Kita-Yatsugatake. Together, these two mountains stretch over more than 20km from north to south, and are 2,200 to 2,900m above sea level, and are generally referred to as Yatsugatake. Both the north and south are volcanoes that arose from the Tertiary layer in the Fossa Magna region. ...

*Some of the terminology that refers to "Northern Yatsugatake" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…狭義には主峰赤岳(2899m)を中心として南北に連なる西岳，編笠（あみがさ）山，権現岳，阿弥陀（あみだ）岳，横岳，硫黄岳，峰ノ松目などの山列を指す。近年はこれらを南八ヶ岳としてまとめ，夏沢峠以北の根石岳，天狗岳，中山，縞枯（しまがれ）山，横岳などを北八ヶ岳として，両者を合わせて南北20km以上にわたって連なる標高2200～2900mの山列を八ヶ岳と呼ぶのが一般的となった。南北いずれもフォッサマグナの地域に，第三紀層を基盤として生じた火山群である。…

※「北八ヶ岳」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