Muji is a Japanese department store with that typical Japanese look. It's not that everything is…read morered/white and that there are Japanese signs everywhere but it has that clean, natural and simple look in the store, and with the items they sell as well, that makes it so recognizable Japanese.
Muji sells all kinds of things; stationary, table ware, porcelain, clothing, toys and even furniture. The good quality products are not cheap but not expensive either. I would say they are worth the money.