If there's a bigger Muji fan on this continent (hey, Canada!), I haven't met him, but the pajamas we got for the kid in Japan over the summer are the dorkiest dork-jamas in the world.
Or at least they're meant to be. They're totally normal cotton 2-piece PJ's, with a plastic snap-close collar. We got red, which doesn't show up online, but they're just like these grey ones. Once we got them out of the package, we spotted these buttons up under the kid's armpits. And there are matching buttonholes on the pants' elastic waist. If you do as you're apparently meant to, and hike the kid's waistband up under her arms--and button it in place--you will turn even the most adorable, golden-haired moppet into a mini-me version of Ed Grimley. It looks ridiculous.
Fortunately, the pajamas work just fine without buttoning your kid's pride away. So in the end, it's all good. Here's hoping Japanese parents have enough sense to figure that out, too.
Smooth Cotton Pajamas - Grey, 1,575 yen [muji.net, japan(ese) only]
related: On the other hand, she is so cute in this raincoat, she stops people in their tracks. Literally. It's almost unfair to other kids to take her outside.