Tokyo is a great place for second-hand bargains, and Shinagawa Intercity Flea Market is one of my favorites. In addition to clothes you’ll also find all sorts of home décor, accessories and electronic goods. Come early (as in right when they open) for the best selection of goods. Later in the afternoon, most of the good stuff is gone.
Some stalls are very big, but my experience is that it’s the smaller vendors, selling items from their own wardrobe, who have the best deals both in terms of price and quality. Last time I visited the market, I found a pair of cashmere culottes for only 500 JPY.
Most vendors will not allow you to try the clothes on before buying. Instead I would suggest that you write down your measures in advance and bring a measuring-tape, so you have a fair chance to evaluate, whether you’ve got the right size.
There are nice and clean restrooms at the northern end of the building, and if you get hungry after all the shopping, there are plenty of eateries and fast food restaurants in the building.
Shinagawa Intercity Flea Market spans several floors and if the weather is nice, the market also spills out on the open space in front of the Intercity Building.
The Intercity clusters of buildings, where the market is located, is just east of Shinagawa station but the station is huge and it can be tricky to find the market. I have marked the exact location in the map below.
Shinagawa Intercity Flea Market, Shinagawa Intercity, Hours: Every Sunday: 10am-4pm