Koson OTANI, the head of the Hongan-ji School, favoured Kaisei, mourned Kaisei's passionate life and, even though Kaisei had left the school before his death, gave him the posthumous Buddhist name "Shogetsuin"; Koson also wrote the inscription on Kaisei's gravestone, which Sohaku ASADA, a doctor of Chinese medicine, established at Asakusa-ji Temple.
本願寺派門主大谷光尊は介石が生前に同派を離脱したにも拘らずその人柄を慕って「嘯月院」という諡号を授け、漢方医の浅田宗伯が浅草寺に建てられた墓の碑文を書くなどして、その一途な生き様を偲んだという。