Konigsberg (present day Kaliningrad) is still part of Russia.
It was never part of the German Democratic Republic, though, which is typically what is meant by "East Germany" in a postwar context. Königsberg was directly grabbed by the USSR at the end of the war, and by the time the GDR was established, the Russians had driven out the German population and changed all the signs. (And anyway, the GDR's frontier ended up being nowhere near there; if the Soviets hadn't kept Kaliningrad, it probably would've ended up being part of modern Poland, like Danzig/Gdansk and so forth, and would presumably have still another name.)
All of which is slightly beside the most important point here, which is that Hibiki is completely rocking that outfit. :)