prefectural senior high school (in Hokkaido); public senior high school (in Hokkaido)
Used in Hokkaido to refer to a senior high school operated by the prefectural government, equivalent to 県立高等学校 in other prefectures. The term is specific to Hokkaido's administrative naming.
See also: 県立高等学校
He attends a prefectural senior high school in Hokkaido.
県立高等学校 is the standard term for a prefectural senior high school in most prefectures, while 道立高等学校 is used only in Hokkaido.
Compound of 道 (どう, 'Hokkaido'), 立 (りつ, 'established by'), and 高等学校 (こうとうがっこう, 'senior high school'). The term follows the pattern of 県立高等学校, replacing 県 with 道 to reflect Hokkaido's unique prefectural designation.