Kappo Hana in Laguna Hills(yes, Laguna Hills):
<a href="http://exilekiss.blogspot.com/2008/08/ridiculously-affordable-and-excellent.html">http://exilekiss.blogspot.com/2008/08/ridiculously-affordable-and-excellent.html</a>
Requires 3 day advanced notice. Crazy cheap at $35 per person...