japanese part reviews?

[chmercer]

all i ever hear is that, if its from japan, you can trust the quality and i dont doubt that, but i was wondering if there is somthing like epinions.co.jp or somthing for parts like that? i am thinking of buying a few control arms etc. and i either want to go with cusco or kazama. Im sure both of these products are very high quality, but i would like to hear from people who have them, you know?