Kushiage, the cooking style of deep-frying food on skewers, is an art form at Kushi-Tanaka, a cozy restaurant on a dead-end lane. The chef’s 30-plus years of experience are evident as he plucks skewers out of the fryer and presents them to the dozen or so diners squeezed around the wooden U-shaped counter. A 20-piece feast might include bites of deep-fried mochi, mackerel, shiitake, kabocha, tender ginkgo nuts and an oozy quail egg wrapped in bacon. The set menu takes the guesswork out of ordering.