Yotsuya 3-1, Suga Bldg B1F. Open 11:30am-2, 6-10pm (LO). Closed Sundays.
First-rate French cuisine and very reasonably priced wines. The setting is rather minimal - old-fashioned coffee-shop decor in a well-used basement space, with just a counter and a few tables. Budget around Y6000-8000 for food and drinks.