>>1
For restaurants, it all matters where you are. Major metropolitan areas will generally have a good selection, and all over the west coast you'll find hidden gems of good Japanese food. Although beware, there are many restaurants that pose as Japanese but are in fact run by garlic-eating Koreans (I keed, some of them are OK).

Try (not in any particular order):
+Bento
+Real Ramen (not fucking instant maruchan shit)
+Shabu Shabu (hot pot, lots of other asian cuisine feature sizzling or hot pot styles; Vietnamese and Mongolian are fantastic)
+Tonkatsu, teriyaki
+Nabeyaki (noodly stew/soup type dish, delicious!)
+Yakisoba (as >>2 mentioned, also delicious)
+Donburi (rice bowl entree)
+Curry

At home there are tons of instant products, and some of them aren't half bad. Or for good food just google up some shit, you lazy ass.

Honesty though, if you find a restaurant with good Karbi Beef you win. That shit is > all nip food.