Run by ex-Tsukiji auction-house employee Nakamura Naoto, these 2½-hour walking tours (for one to six people) through all areas of Tsukiji Market start at 3am and take you behind the scenes as dealers prepare for fish and fresh produce auctions. It's the best way to see the market.

The meeting spot is beside the family restaurant Jonathan's on the corner of Tsukiji Outer Market.