The Akazawa clan originated from Seiwa-Genji (Minamoto clan) and was also a collateral family of Kawachi-Genji (Minamoto clan), and additionally, the clan was a branch family of the Ogasawara clan, who served as the Military Governor of Shinano Province and descended from Kai-Genji (Minamoto clan).
家系は清和源氏の一家系河内源氏の傍系　甲斐源氏の流れを汲む信濃国守護家小笠原氏の庶家赤沢氏。