Concierge.com's insider take:
If you're looking for vintage finds or just a good browse, visit one of the city's outdoor antique markets. There are good ones at Nogi Shrine in Nogizaka (second Sunday of the month except November), Togo Shrine in Harajuku (every first, fourth, and fifth Sunday except December), and Hanazono Shrine in Shinjuku (every Sunday, closed in May and November). The largest antique fair in Japan—the Oedo Antique Market (www.antique-market.jp/eng/index.html)—is held on the first and third Sunday of every month at Tokyo International Forum in Marunouchi. The outdoor event started in 2003 and now has more than 250 dealers.