Considering that, his younger brother, MINAMOTO no Tameyoshi, may have been regarded as the leader of the Minamoto clan inside them, but in the Imperial Court and other places, Yoshinobu may have been appointed as high position according to the birth order.
そのことから考えて、源氏の内部では、源為義が源氏の棟梁とされていたが、朝廷などでは、長幼の順を守り、兄である義信を高位につけた可能性もある。