The family line is a generic name of Kozuke-Genji (Minamoto clan) which is descended from Yoshishige NITTA, the first son of MINAMOTO no Yoshikuni, the third son of the Chinju-fu shogun (Commander-in-Chief of the Defense of the North), MINAMOTO no Yoshiie who is the toryo (head of the clan) of Kawachi-Genji (Minamoto clan) which a line of Seiwa-Genji (Minamoto clan).
家系は清和源氏の一流河内源氏の棟梁鎮守府将軍源義家の三男源義国の長男新田義重を祖とする上野源氏の総称。