I learned about Kitazawa Seed Company
http://www.kitazawaseed.com here last year, so when I wanted some of those watermelon radishes and some baby bok choy and a couple of other oriental things, we decided to give them a whirl. Put the order in over the weekend on the website and it arrived this afternoon, priority mail!
The seed packages are very, very generous - not quite what you see with the Franchi seeds from growitalian.com, but generous. Some of the envelopes are close to half full. I'm very pleased.