However in February in 1184, they lost the Battle of Ichinotani against MINAMOTO no Yoritomo's younger brothers, MINAMOTO no Noriyori, MINAMOTO no Yoshitsune, they lost many members of the clan, and the older brother, TAIRA no Shigehira was caught by the MINAMOTO clan.
だが、寿永3年（1184年）2月の一ノ谷の戦いで源頼朝の弟の源範頼・源義経に大敗を喫し、一門の多くを失い、兄の平重衡も捕らえられてしまった。