Among the Tang dynasty Chinese books that Kūkai brought back to Japan in 806 CE was an original edition Yupian and a copy of the (121 CE) Shuowen Jiezi.
In 806 CE, within the collection of Tang dynasty Chinese books that Kūkai brought back to Japan included an original edition of Yupian and a copy of the (121 CE) Shuowen Jiezi.