Japanese cooking

Hi, you didn't specify what kind of Japanese cooking. You may want to check out Kitchen on Fire in Berkeley for classes if you're interested in learning how to make ramen/udon noodles from scratch or hot pots.

I don't have recommendations for in-person classes, but the recipes by Nami on http://www.justonecookbook.com/ are always good. She also writes about the Bay Area (I believe she's based in the South Bay), so she may have leads if you contact her. I'm Japanese, and her recipes have always been spot-on, with interesting cultural notes for those interested in learning about the kinds of everyday, delicious foods Japanese families eat.