When you are in the San Francisco Financial District and get a yen for Japanese cuisine, you can find good Nippon nosh at Niji Japanese Grill. While the menu is not extensive, Niji offers a decent array of bentos from teriyaki to soba noodles to maki to tempura. I usually order the salmon teriyaki bento which has a large fillet of grilled salmon, steamed broccoli, steamed rice, garden salad and miso soup. Everything tastes fresh and not overly seasoned. Niji is at the far corner of the Crocker Galleria but worth the hunt. I highly recommend Niji for a quick and inexpensive Japanese meal.