古こ筆ひつこひつMeanings1nounold writing; ancient calligraphyRefers to old calligraphic works, especially from the Heian and Kamakura periods, often valued as art or historical documents.この古こ筆ひつは平へい安あん時じ代だいのものと伝つたえられている。This old calligraphy is said to be from the Heian period.