Morioka Third High School
 The Morioka Daisan High School (岩手県立盛岡第三高等学校 Iwate-kenritsu Morioka Daisan Kōtōgakkō) commonly referred to as Morioka Third High School or San-Kō is located in Morioka Iwate Prefecture Japan. It is the third oldest public high school in the city founded in 1963. It has a student body of approximately 1000 students.