-Japan went to the peace conference at Versailles in 1919 as one of the great military and industrial powers of the world and received official recognition as one of the "Big Five" of the new international order.
-It joined the League of Nations and received a mandate over Pacific islands north of the Equator formerly held by Germany.
-Japan was also involved in the post-war Allied intervention in Russia, occupying Russian Manchuria and also north Sakhalin (with its rich oil reserves).