> yeah, I know that manga is read in Germany.

The manga market in Germany is quite different from the Japanese one.

Of course, the numbers of products and sales are much, much smaller than in Japan.
Also, there are virtually no comics done in manga style by Germans themselves, so pretty much everything gets imported into Germany from Japan. Even the few exceptions of American "manga" outnumber the German originals.
When the manga thing started in Germany, publishers decided themselves what they wanted to import. Sometimes that went well (as with the works of Masamune Shirow), sometimes it didn't. These days, the business practice has changed and the readers' and consumers' demands and opinions are considered before making choices on what to import. There is a sufficent number of German "otaku" for this who are familiar with the more popular recent titles that are coming out in Japan or classics which still await publication (recently, older works of Osamu Tezuka got published, as well as Keiji Nakazawa's "Barfuß durch Hiroshima").