Tsukiji Outer Market — Street Sashimi & Casual (Tokyo)

World's largest fish market (relocated 2018 to Toyosu). 470+ sushi vendors. Morning auctions 5-7am (tuna bidding). Sushi breakfast ¥1,500-3,000. Walk between stalls sampling sea urchin (uni), scallops (hotate), octopus (tako). 3 million annual visitors. No reservations—first-come, first-served.