I love Japanese food a lot. these are my favorite that i always like to cook:
Yakitori, Nikujaga, Korokke, Miso grilled fish (salmon), Katsu curry, Udon, Yakisoba, Sushi rolls, Miso soup, Sukiyaki, Tonkatsu, Okonomiyaki, Curry and Rice, etc...
P.S. Great place to get Japanese food in UK: http://www.japancentre.com/