Jodai Tokushu Kanazukai is Japanese phonetic orthography used in ancient Japan (around the Nara period), which can be observed in the documents written in Manyo-gana (Chinese characters used as phonetic characters) such as "Kojiki" (The Records of Ancient Matters), "Nihon Shoki" (Chronicles of Japan) and "Manyoshu" (Collection of Ten Thousand Leaves).
上代特殊仮名遣（じょうだいとくしゅかなづかい）とは上代日本語における『古事記』・『日本書紀』・『万葉集』など上代（奈良時代頃）の万葉仮名文献に用いられた表音的仮名遣である。