Pongala Curry is a small chain of Sri Lankan curry restaurants – 2 in Tokyo and one in Osaka. The one I visited in Tokyo is in the north Ark Hills building next to the InterContinental hotel.
It was a quick meal of spicy beef curry with rice that was a welcome taste difference from the Japanese curries I’d been eating for the past couple of weeks.
You can also grab standard Japanese beers.
For a decent, quick, spicy meal Pongala Curry a great answer.