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- Germany--Foreign relations--Japan (3)
- Japan--Foreign relations--Germany (3)
- Austria--Foreign relations--Japan (1)
- Germany--Foreign economic relations--Japan (1)
- Germany--Foreign relations--20th century (1)
- Germany--Military relations--Japan (1)
- Japan--Foreign economic relations--German (1)
- Japan--Foreign relations--Austria (1)
- Japan--Military relations--Germany (1)
- World War, 1914-1918--Diplomatic history (1)