If you can't decide between Japanese and Korean food, then Nippon has got you covered. The menu is mostly Japanese fare, like sashimi and bento boxes, but there are also a number of Korean specialties, such as bulgogi. Located near the Bank of Spain, Nippon is a solid bet for lunch and dinner, especially on Mondays, when many restaurants aren't open. If you're on a budget or simply or prefer your food al fresco (Retiro Park is within walking distance), take note: Nippon offers a significant discount (think 50% off on some dishes) if you order your food for takeout.