The person who checked whether these pieces of kohitsu were genuine or not was called a kohitsu-kanteika (a connoisseur of kohitsu), and Ryosa KOHITSU was famous as such a connoisseur at that time.
これらの古筆の真贋を鑑定する人を古筆鑑定家と称し、当時、古筆了佐は有名である。