The problem is that even the few jap games still coming out are near to impossible to find/nobody cares to spread them.
Classic places are full of the same old shit again and again and again. So what do we talk about? :-/
About Bleemcast, yes there is an old beta around, able to play many games with different results, some excellent, some poor. Was it 1 year ago? There were some webpages with compatibility lists. BTW great emulator for a buggy beta.