Riemon Soga, who was the husband of Kakyu's elder sister and a dealer in copper who believed in the Nehan-shu sect and was a Buddhist parishioner of Ku-zen (Masatomo), gave Masatomo material and mental support when Masatomo returned to the secular life and opened "Fujiya."
嘉休の姉婿にあたる銅師で、涅槃宗の信徒であり、空禅（政友）の檀家であった蘇我理右衛門は、空禅が還俗して「富士屋」を開く際、物心両面で政友を助けた。