One is the Social Democrats, a historically important party (est 1945) that was allowed to continue to exist, it’s currently run by communists of course. So it’s like the GOP in Massachusetts or something.
The other is the Chondoist Chongu Party, a party based on a religious movement that combines Confucianism with the old local religion of Korea.
East Germany had other parties too, control by and elected jointly with the commies. They had names that suggested diverse ideology but of course it was just for show. 4 of them, 2 merged with the CDU upon German reunification and 2 merged with the FDP. Merkel was briefly involved with one.