I was on Koyasan once and in a shop selling all sorts religiously orientated objects. I ask the price of a rather beautiful fan I liked the look of and was met with head shaking and crossed fingers. My guide told me that apparently they were not for sale to anyone who was not a member of a monastery. I bought a similar item from a shop a bit further along…
I walked into a small empty Asakusa izakaya quite late at night, having just arrived in Tokyo for the first time. As I entered, the elderly mama san said in a loud voice and shake of her head, "No [speak] English." I replied with a bow, "Hai, shouchi itashimashita. Nihongo wo sukoshi hanasemasu." But she pointed to the door. I crossed the road to another izakaya this time with quite a few customers who plied me with beers, delicious marinated potatoes (because I was a veggie) and we swapped meishi!