Tsugaru (also known as Aomori) is a dialect group of (Eastern) Japanese which is not intelligible to mainstream Japanese [jpn] ( Masayoshi Shibatani 1990: 185 , William L. Schwartz 1915: 171 , Vance, Timothy J. 1980: 365 , Takubo, Yukinori 2018 ) and thus merits its own entry. See also: Japanese [jpn].