The reigns of the UTSUNOMIYA family were succeeded by not the first son Tokitsuna but Yasutsuna UTSUNOMIYA, his half brother with a different mother who was the daughter of Tokimasa HOJO.
宇都宮家の家督は長男の時綱ではなく、北条時政の娘を母とする異母弟の宇都宮泰綱が継いだ。