Three ancient manuscripts mentioned below (each of which is an important cultural property) were bought by the Agency for Cultural Affairs after World War II, and currently belong to the National Museum of Japanese History.
下記3件の古文書（各重要文化財）は、第二次大戦後に文化庁買上げとなり、現在は国立歴史民俗博物館の所蔵となっている。