Tsugaru District, Mutsu

Tsugaru was a district located in the old province of Mutsu, Japan. The district once had a land in southern Hokkaido but in 1878, the district dissolved by splitting up into 5 districts.
As the Tsugaru Domain, the area was considered a de facto province in its own right, and even today Japan Rail and other local railroad stations prefix Tsugaru- to their names instead of Mutsu- as in stations in the rest of Aomori Prefecture.

Description

1664 - Under Tokugawa Shogunate's orders, Tsugaru District's name was visible on the letter published by the shogunate against the Tsugaru Clan's Tsugaru Nobumasa. This order combined Hanawa, Hiraga, and Inaka Districts in the Tsugaru Region.
1878 - The district split up into 5 districts, which consisted on the following below.