Last year when we were in San Francisco we found this really great Japanese sweets shop. It was a bit pricey but they had some of the best mochi I've ever had. Mochi is Japanese glutinous rice pounded into paste and molded into a shape. You can get a lot of different flavors and I tried the sakura (cherry blossom) flavor. It was pink and yummy. The whole place was adorable and worth seeing even if you don't try anything.