岸辺 成雄
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レオ トレーナー
… The names of two additional pipes, to 斗 and boku ト, neither of which is used in the modern Japanese Shō, are mentioned in the old Japanese compendia of musical knowledge, such as the Zokukyōkunshō 續敎訓鈔, the Taigenshō 體源鈔, and the Gakkaroku 樂家錄. … From evidence found in the oldest of these three, the Zokukyōkunshō, it is demonstrated that the notes produced by these four pipes must have been sōjō 雙調, tangin 斷金, rankei 鸞鏡, and shōsetsu 勝絶, respectively. …
IR