Immermannstraße is a famous street in Düsseldorf the capital of North Rhine-Westphalia and is said to be the main artery of the huge Japanese community. Basically everything relevant for Japanese currently residing Germany or simply Japan interested people is available here.
They street has:
The Japanese embassy
Japanese hotels (good if you are a Japanese guest in Germany)
A Japanese bakery
Japanese/Korean food specialty shop
Various Japanese restaurants
A Japanese supermarket (buy some Calpis)
Japanese bookshop
So if you are in Düsseldorf make sure to check out this street it is located just 5 minutes from the train station.
Own or work here?