There was and is no President of Japan. It is an Empire and has a monarch and a parliament lead by the Prime Minister.
Hirohito was Emperor from 1926 to 1989.
Hiro Hito
The President during World War 1 was WoodRow Wilson
japan
In world war 1,germany started the war,but in world war 2,japan started it and usa ended the war
President Dwight D. Eisenhower.
President Wilson blamed Germany for World War 1.
japan and Italy
World War 2
Japan had conflicts with China and Russia before World War one.
See website: Japan
Japan. It was not called World War 1 at the time. It was called The Great War. After World War 1, he went on a World Tour promoting peace. It was the first time a Japanese Emperor had ever left Japan.
President General Eisenhower.
Raymond Poincaré was President of France following the First World War.