It is likely that the tax exemption was favorable treatment for doing Buddhist memorial service of the seventh anniversary of Keiju KYUAN's death in Sofuku-ji Temple as it was written in the autographic signature of 1577, that Sofuku-ji Temple was the ihaijo (site of a Buddhist mortuary tablet) of Keiju KYUAN; being after six years from the autographic signature of 1571 issued in the time of Kimyo, it was the seventh anniversary of her death.
この天正5年の判物に崇福寺が久庵慶珠の位牌所であると記載されており、元亀2年（1571年）の奇妙時代の判物から考えると6年後となり、久庵慶珠の7回忌にあたって、崇福寺にて7回忌法要を行ったことによる優遇と考えることができる。