Shugo's control over kokuga was so remarkable in Togoku (the eastern part of Japan, particularly the Kanto region) that shugo had almost finished gaining control over the kokuga by the beginning of the 15th century.
守護による国衙支配は、特に東国で顕著であり、15世紀初頭までに守護による国衙掌握がほぼ完了していた。