Thank you so much for the aswers everyone!
I will definitely contact Nishijin Textile Industrial Association, maybe they can point me out to some manufacturers or stores who do wholesale.
Godwine, oh yes, Strapya Worlds has some really lovely stuff. I already found some of the manufacturers they order from and I thought about maybe getting some products wholesale from Strapya but the best is most of the time to order directly from the brand because it's the lowest price. And the more affordable the wholesale price the better the deal my costumers get.
There
must be a way to find out which brand/manufaturer these little buggers are from it's driving me crazy, eeek. I wish my Japanese was better. I have a good friend who is Japanese but I don't want to "abuse" him with business contact and stuff like that.