This set includes a huge amount of documents that had been stored in the treasure house of To-ji, of which 24,067 items from the Nara period (the eighth century) through the Edo period were designated as National Treasures.
東寺の宝蔵に伝来した膨大な文書群で、奈良時代（8世紀）から江戸時代末期に至る24,067通が国宝に指定されている。