It is said that Nobuyasu Mariya sheltered Yoshiaki ASHIKAGA, a son of Kogakubo Masauji ASHIKAGA, when he came to Kazusa after being defeated in the strife of succession and got Yoshiaki to call himself "Koyumikubo" while calling himself "Boso kanrei."
真里谷信保は古河公方足利政氏の子・足利義明が家督争いの末に出奔するとこれを迎え入れて「小弓公方」と名乗らせ、自らは「房総管領」を名乗ったと言われている。