▁also ▁her ▁first ▁cousin ▁as ▁both ▁their ▁moth ers ▁were ▁half - s ister s . ▁The ▁wed ding ▁was ▁an ▁arranged ▁one , ▁as ▁to ▁c ement ▁the ▁al liance ▁between ▁the ▁two ▁co - f athers - in - law ; ▁Sh ira ka wa ▁spons ored ▁Ki y om ori ' s ▁rise ▁as ▁Chan cell or ▁of ▁the ▁Real m , ▁while ▁Ki y om ori ▁provided ▁military ▁and ▁financial ▁support ▁to ▁Sh ira ka wa . ▁ ▁Tok uk o ▁and ▁Tak ak ura ' s ▁son , ▁Prince ▁Tok ih ito , ▁was ▁born ▁in ▁ 1 1 7 8 . ▁Just ▁a ▁year ▁later , ▁Ki y om ori ▁launched ▁a ▁coup ▁d ' état , ▁s ack ing ▁his ▁political ▁riv als ▁from ▁their ▁posts , ▁ban ishing ▁them , ▁and ▁replacing ▁them ▁with ▁his ▁al lies ▁and ▁cl ans men . ▁He ▁even ▁had ▁Sh ira ka wa ▁imprison ed ; ▁at ▁this ▁point ▁they ▁fallen ▁out ▁of ▁their ▁political ▁al liance . ▁ ▁In ▁ 1 1 8 0 , ▁Emperor ▁Tak ak ura ▁was ▁forced ▁to ▁ab d icate ▁by ▁Ki y om ori ; ▁Tok ih ito ▁asc ended ▁the ▁throne ▁as ▁Emperor ▁Anto ku . ▁Now ▁an ▁em press ▁dow ager , ▁Tok uk o ▁received ▁the ▁name ▁Ken rei - mon ▁In . ▁ ▁In ▁this ▁period , ▁the ▁names ▁of ▁the ▁several ▁gates ▁in ▁the ▁walls ▁surrounding ▁the ▁Imperial ▁grounds ▁refer ▁not ▁only ▁to ▁the ▁wall - open