Aga MURATA wrote that during the Edo period, the living room of the owner or the inner living room is considered as the center of the house, in the case of an owner being absent for a long period of time, it becomes necessary to protect one's fortune by selecting one more center of the premise with a caretaker who serves as an owner, in which case one can think of a house having two centers.
村田あがによれば、江戸時代では、家主の居間奥居間を元とする考えが多いと述べており、家主が長期不在の場合は、一家の吉凶を敷地中心点で取りつつも同敷地内にて生活する留守居番の吉凶は、留守居の住まいの中心で判断するなど中心が2箇所とる考え方があったと述べている。