Taobao is a huuuuuuuge marketplace and you can find dozens of so called heritage style brands and designs, some of them (few tbh) offer similar quality to the products made in Japan, most of them just offer similar goods at a lower price point. As a general rule of thumb if you want to have the best, don't even waste your time browsing Taobao. If you don't care to have the best and if you like to get max value for money it may be worth the hassle of browsing a chinese website, translate everything via google translate, use a proxy etc etc.. I do enjoy the hazard of buying from China, I don't care to have the best (apart from jeans), and I am a cheapskate so I use it.
I have mixed feelings regarding Bob Dong, I hate the fact that he copied some MF designs, but to be honest his basics are really good, fit great and bear an incredible price x value ratio. I have lots of his heavyweight basic tees, the fit is perfect for me and they stood the test of time much better than the Japanese counterparts I had. So when it comes to t shirts to me it doesn't make any sense to buy Japan made stuff. I also love the way his jeans/pants are cut and like them for what they are (very nicely fitting jeans/pants), but there is no friggin comparison fabric and workmanship wise with Japan made denim. A pair of Bob Dong jeans doesn't give me the feel of "soul" that I get from my Tcb's, too.
I think of Bronson as a Chinese version of Buzz Ricksons, which offers lots of military repro garments. The quality isn't comparable to Buzz, but again for some type of garments I don't feel the need to have the best, so Bronson works great to me.
As far as ethically made goes, I have no idea, but between buying from a Chinese owned company that makes stuff in China and buying from a US/Euro/Jp owned company that sells stuff made in China I definitely prefer the first option. Some of these Chinese brands are very small operations, I think they're just as much ethically managed as their Japanese counterparts. I'd love to hear what our Chinese forum members think about this.