The fact that silver, textile fabrics, cloths and threads were brought to Tang Dynasty from Japan as tribute, and textile fabrics, spices, medicines, Buddhist objects, scriptures and books were brought into Japan from Tang, is seen in records as ones written by the Japanese envoys to Tang Dynasty China.
遣唐使などの記録を見ると、日本より唐に対しては銀や織物、糸や布が朝貢され、唐より織物や香料、薬品、仏具、経典・書籍などが将来されたことがわかる。