空気読めない

ACDCRAG!!! THE GOAT!!! i love their stuff, all very comfortable and has super fun designs. their free size is about a us medium, but I don't know what their plus size sizing is like.

drug honey- really cute brand, makes mostly yamikawaii and casual dark girly pieces

etsy- there's a bunch of shops on there selling a variety of clothes and accessories, zombieunicornjewelry and merbunnybaby are a few of my favorites.

listen flavor- a brand if you have some extra money to spend. pretty much the original yamikawaii brand, but somewhat expensive. if you can find secondhand though, go for it! (and tell me lol because I can't find much)

depop- looking up yamikawaii will give you a bunch of fun stuff that people are reselling, though quality and shipping can vary wildly. great to find secondhands of any of the previously mentioned brands.

keimarket- another reselling website, but specifically for reselling jfashion pieces, an offshoot of the lolita reselling site lacemarket. though it's pretty much overrun with girly kei and gyaru (a lot of liz Lisa for some reason??), some yamikawaii stuff can be found.

Hell, half the stuff I find is either general jfashion stuff that happens to work for my menhera bag and looks or actual menhera pieces that are just not in the top search results because they use more tags than just menhera. Plus, there's plenty of EU and UK options for those in either one! If it's not under Yami Kawaii or Menhera searches, I've had luck with medikawa and Medical Kawaii (you'd be surprised how many cute accessories and clothing exist thats advertised towards registered nurses too!)

Mercari and Ebay are also worth looking at and if you look hard enough, you're often able to find amazing pieces for cheaper than Depop (i use Depop as a last resort due to people overpricing intentionally). If you can access and order through a 3rd party website, you can try to access both the Japanese websites and get more options!