Higashi-Nakano 4-2-25. Open 5pm-midnight. Closed Sundays.
The extensive sake collection here includes a good range of Juyondai, including some rare bottles. The master is quite exacting in his recommendations, so be prepared to be quizzed about your tastes in sake; the reward will be an introduction to some unusual brews. The food is also top-notch, with good grilled fish and chicken. Budget around Y4,000-7,000.