If you don't have the time to hit up one of Costco's suburban locations, reseller Stockmart is the next best thing. With a small fraction of the space of an actual Costco warehouse, they stock some of the chain's "greatest hits" - selected cheeses, meats, wines, ready-to-eat prepared foods, baked goods, gigantic bags of tortilla chips, super-sized condiments and so on. They're located just a few minutes from Shimo-Kitazawa Station.