Inside of Shinagawa Station is a branch of Bar Marche Kodama. It is in the part of the station that is a small mall called ecute. The store specializes in cured meats, pates, and sausages. I sometimes buy from the Shinjuku branch which is in Takashimaya depachika, and conveniently located near the wine shop.
This Shinagawa branch is famous for its breakfast buffet as it includes all-you-can-eat cured ham. The spread is simple, and not too luxurious, but for 620 JPY, this is a bargain. There is also a bottomless cup of coffee, something that is hard to find in Tokyo.
There is outdoor seating, which I recommend. If it is raining, the indoor seating is very limited, so I wouldn’t recommend it as surely the wait to be seated would be long.
I wouldn’t make a special trip across town for this, but if you are in the area, it’s nice to have on your radar. The buffet is from 8:00 – 11:00 a.m. It is very popular so you may have to wait. If you get impatient there are many other restaurants in the area.
Bar Marche Kodama
Shinagawa JR Station – ecute 1st floor