Goshui Wakashu is the fourth Chokusen Wakashu (anthology of Japanese poetry compiled by Imperial command) of the Hachidaishu (the eight Imperial anthologies of Japanese poetry), and it came out after "Shui Wakashu" (Collection of Gleanings of Japanese Poetry).
後拾遺和歌集（ごしゅういわかしゅう）は八代集の第四、『拾遺和歌集』の後継たるべく編まれた勅撰和歌集である。