HIRAMA learned kendo (Japanese fencing) from the third son of Sadamoto, Kamo SERIZAWA (the son-in-law of the Shimomura family of Shinto priests, who were experts in the Shindo Munen-ryu sword style) and received a license to practice Shindo Munen-ryu.
平間は貞幹の三男芹沢鴨（神官下村家に婿養子、神道無念流免許皆伝）から剣術を学び神道無念流の目録を得た。