If you want to cook and eat Western style, it is completely possible, but be prepared for the high prices. Initially, you may be horrified at the outrageous prices of food, in particular fruits, vegetables and meat. Realize that you are being paid VERY WELL and can afford to eat well. The range of fresh produce is very good, if a little intriguing, and the sizes and shapes of fruits and vegetables here can sometimes be amusing. Have someone explain how to prepare and cook the more unusual items.
Seafood abounds, it is very fresh and often reasonable in price.
The variety allows you to be daring, but some of it might appear quiet weird. Again, advice on preparation and cooking is a good idea. What also might come as a shock to you is the size of your kitchen. Many are about the size of a closet and lack some of the comforts of your kitchen at home. The typical Japanese kitchen will have a small refrigerator and a gas range with two gas burners.