Since Tatsuo-maru was very young then, vassals from the Miura clan and Asahina clan supported relative Norimitsu OSHIKA (cousin of Yoshitada) as successor, and this led to a succession dispute involving several battles between the Tatsuo-maru faction and the Norimitsu faction.
龍王丸はまだ幼少だったため、家臣の三浦氏、朝比奈氏らが一族の小鹿範満（義忠の従兄弟）を擁立してお家騒動が起こり、龍王丸派と範満派が分かれて数度の合戦に及ぶ事態になる。