[4] Beginning in the mid-1950s, the Japanese companies returning to Germany in the post-World War II period were mostly settling in Düsseldorf,[5] while in the pre-World War II period the Japanese population was concentrated in Hamburg.
[6] Arikawa stated that the Japanese settlement began when ten businesspersons from Tokyo, trying to buy metal ore and machinery for Japan, established their businesses in Düsseldorf.
Due to this settlement, information about the Ruhr region circulated within Japanese companies.
[4] Due to Düsseldorf's central location within Europe and proximity to other areas in Europe, its location in the Ruhr industrial area, and the proximity to the river port Duisburg, Japanese companies had a preference for Düsseldorf as they established European operations in the 1970s.
[4] In 1985 the general manager of the Japanese Chamber of Commerce and Industry in Düsseldorf, Akira Arikawa, stated that of all of the cities in the world outside Japan, Düsseldorf had the highest concentration of Japanese residents.
In 1985 Mark Heinrich of the Associated Press (AP) stated that the Hotel Nikko Düsseldorf on Immermann Street was the center of the Japanese community.
[7] The Japanische Internationale Schule in Düsseldorf is located in Niederkassel,[8] and it previously had a campus in Oberkassel.
Its coverage included European Economic Community (EEC) developments, consumer news, a column on Japanese company representatives, area Japanese sports, and travel news.
[7] As of 1985 company employees arriving in Germany often move into residences formerly occupied by those returning to Japan.
[7] The Japanische Ergänzungsschule in Düsseldorf (デュッセルドルフ日本語補習校 Dyuserudorufu Nihongo Hoshūkō), a Japanese weekend school, is a part of the institution.
[17] In the spring of 1985, Japan Airlines started a flight from Tokyo to Düsseldorf on a twice weekly basis.