Aizu-Wakamatsu's Beautiful Tsuragajo (Tsuraga Castle)
Approaching the northern entrance, you'll pass a few snack shops. But I didn't see any obvious place to get a quick full meal. It's a somewhat residential area; there is a sit down restaurant on the main road near the tourist bus stop.
Admission to the castle and teahouse together is 500 yen, both of which are open 8:30 to 17:00. Tea and a snack at the teahouse is an additional 500 yen. The tourist loop bus stops about 5 minutes away (Tsuragajo Kitaguchi).