(it's 12:30am and my brain is not working well, so pardon any mistakes)
I think the owners of A&J;has been operating that restaurant for 14 years now. Their food is OK, I prefer thinner version of the green onion pancake and theirs is too thick. On weekends I go there sometimes in the mornings for Chinese breakfast items.
Best Ay-Chung noodles that I've tasted... in Shimending, Taipei, standing room only.
If you like japche and eat in Cerritos area, try this Korean place by Pioneer & South St. To the SE corner there's a couple shopping plazas. Look for the Filipino restaurant Pinay Pinay, then (facing the restaurant's entrance) look to the left. I recall there's a Korean restaurant by there and their japche was really, really good. It's been several years though (way too old for me to hang out at Guppy, cough), so donno if it's still there.
I like this Korean place called Ye Dang in La Habra, in SW corner of Beach Blvd & Imperial HWY. Their mushroom hot pot, beef stew, and spicy fried squid is pretty good. The seafood pancake thee is OK too but not as good as this Korean beer house in Garden Grove.
Went to eat at a Korean restaurant on Jeffery/University today. If you take 405 FWY exit Jeffery/University and head west. To the right you'll see an IHOP, pull into the center and you'll find a Korean place behind it. Their lunch special cooked sliced beef (boneless, not kalbi) was surprisingly good. Nice and tender, not over-done, well seasoned. Look to the right and you'll find a Pho Bac.
Best pickled veggie (modified Korean style) I had was actually from a short glass container sold at Ranch 99 back in 2000's. The daicon were chopped into small squares and every piece was nice and crunchy, tasty, and wonderful. But I can't find it anymore.