The only ground meat pie with a pastry crust that I'm aware of is tortiere... No pastry in Canada either, nor does that appeal. The only ground meat pie with a pastry crust that I'm aware of is tortiere, also delicious. Pot pies generally have something chunky and stewish inside (beef or chicken).
Germany never did. East Germany became communist in 1945 when the USSR ocupied it after WW II.
Of course not. It's a capitalist country. However the end of the WW2 is a point in history where indeed Japan could become a communist country. The USA though sensed the danger of a Soviet occupation of Japan and decided to use their nuclear bombs to force the Japanese surrender to them.