Most visitors to Berlin eat Asian food in Kreuzberg. Some find it in Mitte. Almost none take the S-Bahn west to Charlottenburg, where a four-lane boulevard lined with nondescript apartment buildings holds the densest concentration of high-quality Asian restaurants in the entire city. This is Kantstraße — and the fact that you've never heard of it says more about how Berlin tourism works than it does about the food. Kantstraße runs roughly from Zoologischer Garten to Amtsgeric