Starting with the Kokin Wakashu (Collection of Ancient and Modern Japanese Poetry) (completed in 905) until the Shinshoku Kokin Wakashu (New Continued Collection of Ancient and Modern Japanese Poetry) (completed in 1439), 21 chokusen wakashu were compiled during the 534 years.
古今和歌集（延喜5年（905年）成立）に始まり、新続古今和歌集（永享11年（1439年）成立）までの534年間で、21の勅撰和歌集がある。