His parents, having heard of Kawai's Seppuku, became extremely angry and had a great tomb built in Mibu-dera Temple to worship their son, apart from the tomb which was built by Shinsengumi.
河合の切腹を聞いた親は大変怒り、新選組が立てた墓とは別に息子を供養するための立派な墓を壬生寺に建てた。