Same in Germany. Most or all the Mochis I see in German supermarkets are sweet ones. If you find an Asian market, there might be some. Or Korean Toppogi is similar to our Mochi.
So Manga is a good source of learning. I must think about let my daughter read some to get to know Japan more 😁
Oh! I do have toppoki! I bought a package a month ago, thinking I'd cook them in a spicy sauce, but the hubby keeps saying "Not today, I want something else today." He's never even tried rice cakes, so I don't know what he has against them. I hope the best before date hasn't passed...