Koyo's grave is in Aoyama-bochi Cemetery and his tomb is inscribed with brush style writing by Ichiroku IWAYA, one of the three greatest calligraphers during the Meiji Period who was the father of Sazanami IWAYA, Koyo's best friend and a member of Kenyusha.
紅葉の墓は青山墓地にあるが、その揮毫は、硯友社の同人でもある親友巌谷小波の父で明治の三大書家の一人といわれた巌谷一六によるものである。