Many people, such as Yuko OMURA, Josho HORIN, and Mitsuhiro KARASUMARU, were engaged in appraisal, and Ryosa KOHITSU became a professional appraiser of old writings.
大村由己、鳳林承章、烏丸光広など多く人が鑑定に携わっていたが、古筆了佐はこの古筆の鑑定を生業とした。