If you sew you will know Amy Butler, Lotta Jansdotter and Etsuko Furaya. I found an online shop here in Japan selling everything! The prices are slightly higher for some things but the range is extensive. I'm especially excited about the two international designers there! Check out Cotton Shop So-ing. Shipping overseas is not possible from there.
This shop seems to be part of or affiliated with Kokka, the fabric manufacturer. There are three young designers and a really gorgeous range of bags and accessories here at fififo.
Also I posted yesterday about Kokka. If I'm reading their website correctly you can take your own designs in and have them printed onto fabric! Wouldn't that be cool? I'd definitely need Illustrator to design something ... that and a degree in design!