In the place where the kabuto was found, a monument was erected that states 'The place at which Yoshisada Nitta died' by the lord of domain Mitsumichi MATSUDAIRA, and this place was designated as a national historic site in 1924 under the name of 'Tomyoji Nitta Yoshisada Senbotsudennsetsuchi.'
出土地には藩主松平光通により「新田義貞戦死此地」の碑が建てられ、1924年に「燈明寺畷新田義貞戦歿伝説地」の名称で国の史跡に指定されている。