"Prime Tortoise of the Record Bureau" compiled in Tang China describes that 'in the fourth month of the 22nd year of Kaigen era (734), the envoys came from Japan and presented the emperor with 200 rolls of thick silk fabric called Mino no ashiginu and another 200 rolls of thick silk fabric called Mizuori no ashiginu.'
唐の「冊府元亀」によれば、「開元22年（734年）4月日本国遣使来朝、美嚢絁（みのうのあしぎぬ）二百匹、水織絁（みずおりのあしぎぬ）二百匹を献ず。」とある。