They didn't. The Japanese conflicts occurring just before and during World War 1 had no impact on the European war; this was caused (at least basically) by Imperialism and nationalism, combined with aggressive expansion attempts by some groups.
Emperor Showa was head of the Japanese military during the Second World War.
The attack on Pearl Harbor by the Japanese Military.
Japanese males were CONSCRIPTED (Drafted) into military service.
The military goal of the US in the Pacific during World War 2 was Japanese surrender.
Occupied nations ate their own foods. Japanese military rations had to be preserved for consumption by Japanese Troops.
He was the head of military operations against the Japanese in the Pacific.
Island Hopping
Admiral Yamamoto was probably the most famous Japanese military figure, but he was a sailor, not a soldier.
Yes, since they were directly involved in it, including bombing raids on Japanese cities, and being occupied by the US military after the war.
Island Hopping
Caroline Paul has written: 'East Wind, Rain' -- subject(s): Air pilots, Military, Fiction, Islands, Japanese, Military Air pilots, World War, 1939-1945 'East wind, rain' -- subject(s): World War, 1939-1945, Military Air pilots, Japanese, Fiction, Japanese Americans, Historical fiction, Islands, Military pilots
No, Japanese expansionism in the Pacific and China was another cause.