"Fan Song" - Ouginokyoku

...Other disciples of Yatsuhashi who are not of the blind official lineage include, in addition to Kitajima mentioned above, Sumiyama Kengyo, the founder of the Sumiyama school (who has Tsugiyama Kengyo, the founder of the Tsugiyama school under his disciple), Shirooi Zatō, said to be the founder of the Osaka Yatsuhashi school, and Yoshibe Zatō, said to be the founder of the tradition of Okinawan koto music. Yatsuhashi's works are famous for the so-called Yatsuhashi Thirteen Groups starting with "Fuki," and among them, "Shiki no Kyoku," "Ogi no Kyoku," and "Kumo no Kyoku" are particularly highly valued as the inner "three songs." Other works include the attached piece "Kumo no Rosai," and the secret piece "Koryu Shiki Genji," and it is also believed that Yatsuhashi developed the instrumental pieces "Sugagaki" and "Rinzetsu" to create the current "Rokudan" and "Ran."

*Some of the terminology that refers to "Fan Curve" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…盲官系譜以外の門下には，前記北島のほか，住(隅)山流の祖の住山検校(その門下に継山流の祖の継山検校がある)，大坂八橋流の祖とされる城追座頭，沖縄箏曲への伝承の祖とされる吉部座頭などが考えられる。　八橋の作品は《菜蕗（ふき）》以下のいわゆる八橋十三組が有名であり，とくにそのうち，《四季の曲》《扇の曲》《雲井の曲》は奥の〈三曲〉として重んぜられる。ほかに付物の《雲井弄斎》，秘曲の《古流四季源氏》などもあり，また器楽曲の《すががき》《りんぜつ》を発展させて現行の《六段》《乱》を成立させたのも八橋と考えられている。…

※「《扇の曲》」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報