Akinobu KITABATAKE (the Kasuga Sashosho [Minor Captain of the Left Division of the Palace Guards]), the son of Chikafusa KITABATAKE of the Kitabatake line of the Murakami Genji (Minamoto clan), as well as Akitoki KASUGA (the Kasuga Chujo [Middle Captain], who was either Chikafusa's son or younger brother, and was of the lineage of Mochifusa REIZEI), both took the name "Kasuga."
村上源氏北畠家流で北畠親房の子北畠顕信（春日左少将）、及び春日顕時（春日中将）（親房の子または親房の弟冷泉持房の孫）が春日を号した。