Lefai K.
Yelp
Tensuke Market is a great alternative to try, when you just don't feel like going to Mitsuwa, which is down the street. Tensuke Market has your staple Japanese groceries, although with a smaller selection.
In terms of the food area, you can order from the kiosk, if you're feeling antisocial, or just want to spend a few minutes perusing the menu. The food area seating is definitely smaller than Mitsuwa, but the few times I've went, it's easy to find a seat.
We came here at 7PM on a Saturday evening, and the place was winding down. Hours of Tensuke Market shows it's open until 8PM. Unfortunately several items on the menu were sold out so I got the salmon teriyaki bento box, which included tempura, miso soup, couple of spring rolls, edamame, tempura shrimp and vegetables, and a small slice of salmon with teriyaki sauce.
Food was decent. Edamame were overcooked, most of the veggies were potatoes, and the amount of salmon was probably about 4oz. Food came out quick too. There are cauldrons of free miso soup, but apparently the staff were ready to party on a Saturday night because by then, 3 out of the 4 cauldrons were being emptied out, and the last one didn't even have a handle to scoop out the soup. By the time we got our food, at 730PM, they were already setting the chairs upside down on top of most of the tables. I didn't like the fact that they were cleaning out most of the dining area, 30-45min prior to closing. I get we all want to leave work, and I generally don't come this "close" to closing time, although I don't think an hr before closing time is "close", I wasn't a fan of that. One less star for the experience.