Northeastern Japan Arc

The arc runs north to south along the Tōhoku region of Honshū, Japan.

To the north, the Northeastern Japan arc extends through the Oshima Peninsula of Hokkaidō.

The Ōu Mountains form the backbone of the volcanic part of the inner arc that run from Natsudomari Peninsula in Aomori Prefecture south to Mount Nikkō-Shirane in Tochigi and Gunma prefectures.

The volcanic front consists of four north to south lines of Quaternary volcanoes and calderas, which extend the length of the range.

[1] The outer arc ranges are the Kitakami and the Abukuma Mountains.