The emperor had become a puppet-like figure in Feudal Japan. Shoguns were the head of the country at the time and kept the emperor on his "throne" because culturally, everything was done in the name of the emperor. The last Shogunate was the Tokugawa Clan was later overthrown by the emperor who restored his power to the throne.
the constitution provides that the president "shall have power, by and with the advice and consent of the senate, to make treaties, provided two-thirds of the senators present concur"
