<em>Civil wars and foreign invasions showed that the empire had become too large to be ruled by one person.</em> :-)
Explanation:
Japan's isolation came to an end in 1853 when Commodore Matthew Perry of the United States Navy, commanding a squadron of two steam ships and two sailing vessels, sailed into Tokyo harbor. He sought to force Japan to end their isolation and open their ports to trade with U.S merchant ships
They mainly had Monarchy goverments.
