In 2006, mokkan (a narrow strip of wood on which an official message is written), from approximately the mid seventh century, believed to be the oldest of its kind which was written in Manyo-gana (a form of syllabary used in the Manyoshu [Collection of Myriad Leaves]) was excavated.
2006年には、万葉仮名で書かれたものとしては、最古とされる7世紀中ごろの木簡が出土している。