I have been to Masago for lunch once, and I have ordered delivery from there many times for lunch. All of the food is delicious! They have all of the regular Japanese restaurant fare, including sushi, hibachi, teriyaki and tempura. They have some really interesting and unique sushi rolls and appetizers. I particularly liked the Green Phoenix, which spicy tuna wrapped in avocado (no rice or seawood) with ponzu sauce.
The prices are really reasonable and at lunch they have big discounts on all of their food.
The delivery service is excellent, each time we have gotten everything we ordered and right on time.
Sushi Lounge and J. Hinari are both really good also, but they have more limited menus and they are more expensive. I would highly recommend Masago for Japanese food in Morristown, NJ.