It is said that Sadanaga died on the battle with Yoshisada NITTA and the son Nagataka OGASAWARA who lived in Kyoto was the master of Kyuba (archery and equestrianism) of Takauji ASHIKAGA, but it is doubtful whether it is historical fact.
貞長は新田義貞と戦って討死し、子の小笠原長高は京都に住んで足利尊氏の弓馬の師範であったというが史実か疑わしい。