One of the larger flea markets in Tokyo, this one lives up to its name with around 800 (!) stalls. You can find everything here, including, possibly, a kitchen sink. There are organic vegetables, crafts, secondhand clothes, toys, antiques and much more. It’s in Chofu, which is a little way out of Tokyo central, but can be made into a day trip.
There’s a small entrance fee of ¥300, but even if you buy just one item, we reckon it’s worth it. If you want to beat the crowds, you can pay a higher fee (¥1,000) to get in at 8am, two hours before the official opening time.