On a budget, Toyosu Market (tuna auction) still earns its price.
Free (eating extra)
This is where the real action moved: from a glass gallery you watch buyers inspect rows of frozen tuna and the lightning-fast auction, then eat absurdly fresh sushi at the on-site counters. The catch — it's a sterile modern building viewed through glass, and the auction means a brutal 5am start (or a lottery for the floor).