Around Jogan era (Japan), among these songs described above were collected into a book, then Masanobu ICHIJO chose scores around 920 (one theory says that FUJIWARA no Tadafusa wrote scores), and later on, songs were brought down by the To and Gen families.
上に述べたような歌謡が貞観(日本)年間ころにひとつの書物にまとめられ、ついで、一条雅信によって延喜20年ころ撰譜され（一説に藤原忠房によって作譜されるという）、以後、藤家および源家によって歌曲はつたえられた。