Mount Usori

...the general term for a cone-shaped volcano and its outer rim located in the northeastern part of Aomori Prefecture and the northern part of the Shimokita Peninsula. Also called Osoreyama or Usoriyama, the name Osorezan comes from the mountain name of the family temple (Entsu-ji) in this area. It is made up of rhyolite, dacite, and pyroxene andesite, and has a caldera in the center with a diameter of about 4 km.

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…青森県北東部，下北半島北部に位置する円錐形の火山と外輪山の総称。〈おそれやま〉あるいは宇曾利（うそり）山ともいい，恐山の名はこの地の菩提寺(円通寺)の山号に由来している。流紋岩，石英安山岩，輝石安山岩などからなり，中央に直径約4kmのカルデラをもつ。…

※「宇曾利山」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