Russia and China Id have to say Russia & USA.Ideologically opposed & both paranoid of the others influences on other countries.
brittsh and texas
if Japanese do something mean, south Koreans become angry with them. but both countries are not enemies
North Korea and Cuba.
Germany and Japan
germany,italy and japan
No countries are enemies of Switzerland. Switzerland is strictly neutral.
Japan and Germany
Iran is among Venezuela's staunchest allies (going both ways) in both Military, specifically Nuclear, and governmental policies.
Belgium has no enemies.
countries
countries