noun
ancient kana; cursive kanji syllabary (Heian period)
Historical term for a writing system used in the Heian period where cursive kanji forms were employed as a syllabary, distinct from modern kana.
上代仮名は、平安時代に使われた草書体の漢字を音節文字として用いたものです。
Jōdai-gana is a writing system from the Heian period that used cursive kanji as syllabic characters.
Compound of 上代 (jōdai, 'ancient times') and 仮名 (kana, 'syllabic script'). The term refers to the cursive kanji-based syllabary used in the Heian period.