Nagasaki Prefecture runs one of the largest prefectural antenna shops in Tokyo, selling a wide range of regional food items that are otherwise hard to find. There's quite a bit of Nagasaki-made shochu (and a smaller amount of Nagasaki sake) in the liquor department, and an impressive selection of both modern and traditional ceramicware that rivals many department stores.
During a recent visit we found plenty of fresh produce - tomatoes, onions, green beans, broccoli, asparagus and biwa - along with Nagasaki wagyu beef. Retort pouches of popular local curries are an antenna-shop staple, and the selection here includes some unusual varieties like tomato-octopus, beef tendon, and pork with bitter chocolate. Other popular items include Castella cakes, sesame- and miso-flavored sembei crackers, dried champon noodles and frozen sara udon, and a surprising range of soy and other sauces.
There's a comfortable cafe-bar corner in back where you can try shochu or local dishes, and in case all this exotic local food inspires you to visit Nagasaki itself, you can head over to the Nagasaki Tourist Desk to get advice on sightseeing and accommodations.