日本京都大学附属图书馆收藏的《凤笙调律吕卷》是传承至今最古老的笙谱之一。该谱出自世代以笙为主业的丰原世家第8代传人丰原利秋之手。文章通过对该谱的形成、乐曲内容、谱字构成、汉字符号和拍节特征等记谱体系的考察，解明了谱字记写特征、汉字符号涵义，厘清了该谱所记早拍子、延拍子、只拍子三种拍节样式规律。《凤笙调律吕卷》中谱字、乐曲源于中国，最终形成了日本的本土化笙乐谱，是日本平安时期雅乐曲谱之集成。

Fengsheng lülü Scroll(《凤笙调律吕卷》)stored in the Library of Kyoto University is one of the oldest sheng(笙)scores passed down to this day.This score was written by the eighth generation descendant Toyohara Toshiaki(豊原利秋)from the Toyohara(豊原)family,who has been specializing in sheng for generations.Through the research of the notation system,including its formation,content,composition of notation characters,Chinese character symbols,and characteristics of beat,this study clarifies the characteristics of notation and the meaning of Chinese character symbols,the rules of the three types of rhythm styles recorded in the score.The notation and music in the Fengsheng lüliü Scroll were originated from China and ultimately formed in Japan,which can be regarded as an integration of Japanese Gagaku(雅楽)scores during the Heian period.