In the early days, descendants usually edited their ancestors' kashu until self-selected collection of poems became more mainstream between the Insei period (the period of cloistered Emperors) and roughly around the Shin Kokin period (c. 1205).
初期には子孫が先祖の家集を編むことが多く、自撰家集が盛んになるのは院政期から新古今期前後にかけてである。