Japan's participation in World War 1 is an often overlooked part of their history - even in Japan itself. Their service as one of the members of the Entente marked the climax of a development that started with the Meiji Restoration, a way out of isolation and into the global alliance system. This brought Japan more power and was also very lucrative. And after fighting in the Pacific Theatre of World War 1, the Siege of Tsingtao and contributing the Japanese Navy to the war effort, Japan had a seat at the table of the Versailles peace negotiations.