I made a first visit to Bar Enrique in Higashi Kitazawa the other evening. It's a tiny little tapas bar (maybe seats ten?) in a location that probably few people go out of their way to find, halfway between Yoyogi Uehara and Shimokitazawa. On the other hand, judging from the reports of friends who live nearby, it's full almost every night. If I lived in the neighborhood, I'm sure I would stop by on a relatively frequent basis for a glass of wine and some nibbles.
Although another trip back is in order to explore more of the menu, there were several things about the place that we found quite promising. Number 1: The owner/chef recommended a very nice wine to us. We did the "something red, full-bodied, around 3000 yen" trick and ended up with a bottle of El Arbar de J&F Lurton, Toro, 1998. This was fairly heavy, with a decent amount of tannins, and suited both of us quite nicely.
Number 2: Lots of ham legs hanging from the ceiling. He's got some very nice Serrano ham. Next time I'd like to try the chorizo, which also looked good.
Number 3: It was the first time I have ever enjoyed eating sardines. He serves a marinated sardine dish (iwashi no suzuke) that I'd seen mentioned as their most popular dish. Despite both of us having a dislike of fishy fish, we gave it a try and were very pleasantly surprised.
We also had some pickles (not particularly wonderful), cheese, marinated grilled scallions (very good), and a dish of lentils and pork stewed in red wine, which was very good. After our meal, we couldn't resist trying the acorn liqueur, a brand called Las Cinco Bellotas. Not surprisingly, it was somewhat nutty, but it wasn't at all bitter; might make a good topping for vanilla ice cream.
Given the size of the place, reservations are probably a good idea.