| The OKUBO Family was hereditarily succeeding the position of Shinto priest of Omikunitama Prefectural Shrine (Iwata City, Shizuoka Prefecture), one of Shikinai-sha (shrine listed in Engishiki laws) since the times of ancestors, so his father, Tadanao OKUBO, was also Guji (chief of those who serves shrine, controls festivals and general affairs). |
大久保家は代々式内社である県社淡海国玉神社（静岡県磐田市）祠官家で、父の大久保忠尚もやはり宮司であった。 |