It is considered that, one person might also belong to a plurality of blood-related groups in the ancient days because connections as a family originated from blood relations not only in the paternal line but also in the maternal line were also existed and, therefore, elements such as local relations were added and a festival zone to which one person belongs was determined.
これは、古代においては、父系のみならず母系の血縁を由来とする氏族としての結合もあり、1個人が複数の血縁集団に属する可能性もあったために、地縁などの要素が加味されて所属する祭祀圏が決定されたものと考えられている。