In addition, there are some letters from Mitsuhiro to Ryosa and some notes written by Ryosa, which were given to Shigemi KOMATSU by a direct descendent of Ryosa KOHITSU in the KOHITSU family.
その他、光広が了佐に宛てた手紙、了佐筆書状などが現存するが、これらは古筆了佐直系の古筆家の末裔が小松茂美に提供したものである。