It's called the Tokyo Hamburg set, and it comes with a meatloaf-like patty drenched in sweet ketchupy sauce and a few afterthoughts of sides - but oh baby, that sauce is fan-bloody-tastic! I've also had their pork tonkatsu (finger licking good, especially with a dollop of Kewpie mayo) and they threw in a bowl of miso soup, with those tender little cubes of tofu, for good measure. The prices here are dirt cheap, the food is hot and tasty, and if you want dessert, just walk down the aisle. There's a cute little Japanese bakery down at one corner - after scarfing down your hamburg or noodles, treat your tummy to a cream azuki bun. Delish.
The food here is exquisite, I have lived in the Boston area for 6 years and this has remained a favorite place to eat throughout. The only drawback is there is often too few seats available, and the wait can be pretty long. You may even be seated next to someone you did not plan on eating with, but as long as you don't mind (my friends and I definitely don't) it's not a big deal. The food is reasonably priced and well worth it.