Try Kappo Sui where Santa Ana, Costa Mesa and Newport Beach collide, hidden at the end of a small strip center. The place can best be described as a Japanese pub. They serve sushi as well as delicious cooked Japanese pub grub. Highly recommended
Clientele is mainly Japanese ex-pats.
Kappo Sui Restaurant
20070 Santa Ana Ave, Costa Mesa, CA 92626
Blue Fin on PCH just north of Laguna. It is not Ichibiri but it is absolutely delicious sushi and great specials, too. They use black bean edamame and it tastes like sweet corn. My daughter is visiting for the Thanksgiving weekend and we are going there for lunch one day. They open daily at 11:30 for lunch.