These two great people were first mentioned in a work by OTOMO no Yakamochi, written in Chinese, which was collected in "Manyoshu" (Collection of Ten Thousand Leaves) as 'A school of 山柿' ('山' means Yamabe, and '柿' means Kakinomoto).
この人麻呂との対は、『万葉集』の大伴家持の漢文に、「山柿の門」（山部の「山」と柿本の「柿」）とあるのを初見とする。