Japan–Russia relations
Japan–Russia relations are the modern bilateral relations between Japan and Russia, following Empire of Japan–Russian Empire relations (1855–1917) and Japan–Soviet Union relations (1917–1991). Historically, the two countries had cordial relations until a clash of territorial ambitions in Manchuria led to the Russo–Japanese War of 1904, which ended in a Japanese victory that in turn weakened the House of Romanov's reign in Russia.