online course, since that's one of my top recommended fabrics a sarong-style dress. I've been using them for a few years, and didn't realize that they weren't familiar to everyone. Well, you're in for a treat, fabric hounds. This stuff is gorgeous, easy to sew, and has a lovely drape for garment sewing.
The first type of Japanese fabric I think of is 100% cotton, with a discernible grainline. It's rather similar to vintage barkcloth, which might be why I love it so! See the prominent grain in the lovely ume branch fabric below? (Note: all of the fabrics pictured in this post are from Fabrictales.com, my favorite place to shop for Japanese cottons.)
B&J here in New York. For shopping online, my favorite is Fabric Tales; also try Super Buzzy. A search on Etsy will bring up lots of options too.
Are you a fellow Japanese cotton fan?