Yaohan is a Japanese super market. They have stores all over the world. Most of the Yaohan's have other stores inside in addition to the main super market. For example the one in Costa Mesa has 4 fast food counters, a bakery, an small appliance shop, a travel agency, a gift shop, a Shiseido counter, a Auto accessories store, a toy store, a Japanese dinnerware store, a book store, a hair salon and a few other things. It's a great place to visit. The food's not great but it's usually passable.
Directions: Take the 405 to Bristol and go south to Paularino. Turn left on to Paularino and right at the next light which is a light specifically for Yaohan's parking lot. Note: the Bristol exit is also the same exit for South Coast Plaza but in this case you go south instead of north.
In LA there is one at Venice and Centinela near Venice Beach and also in Torrance at Western near Carson.