A graveyard which is thought to be of Seizaemon and his wife built by his son Genba, was found in 2003 (Kazuhisa OISHI announced it on February 28 of the same year) at Tarami-cho, Nishisonogi-gun, Nagasaki Prefecture (the present Isahaya City).
息子・玄蕃により建てられた清左衛門夫妻のものと思われる墓所が2003年に長崎県西彼杵郡多良見町（現・諫早市）で発見されている（同年2月28日に大石一久が発表）。