I've just recently completed a sale at Kamikaze and I was quite satisfied. The guy is honest too. If he doesn't have a part, he says he doesn't. Some of their prices are a bit above Hong Kong and some below. What I liked the most was the friendly service and reasonable shipping costs. It's an extreme pissoff to pay $20 for shipping from Hong Kong only to find out it really cost $12.00.
Not all HK shops are bad though. I've found RC Mushroom to be good (although shipping costs are a bit high). RC Champ, slow but reliable. Give them enough time and they can get anything in Japan. Shipping isn't cheap but it isn't a ripoff either. Another shop I've used with no problems is The Border. Prices and shipping are a bit on the high side but that shop seems to get stuff way faster than other shops. Service is good as well.