There is also the firm conviction that Japanese rice is better than others (at least 99% of Japanese will tell you that it is true). However, when given Japanese and American rice, most Japanese can't tell which is the Japanese one. There are so many rice varieties, that it's obviously easy to find very differently tasting ones, like Indian basmati or Thai rice. But Japanese rice with Indian food is strange, and I certainly can't imagine sushi or "katsudon" made of basmati.

Same idea for Japanese fruits, especially melons, strawberries or peaches. But once again, I've carried on my own test on some people and they have no idea which is made in Japan, or even can't tell the 10.000 yen from the 500 yen one. Nevertheless, some of these people were certain the 10.000 yen tatsed much better.