Sushi Zanmai Tsukiji Honten

Sushi Zanmai opened its Tsukiji flagship in 2001 with a then-radical proposition: a quality-conscious sushi restaurant that never closes. Twenty-four hours, 365 days, at the edge of what was then the world's largest fish market. The founder, Kiyoshi Kimura, became a national figure for repeatedly winning the Tsukiji New Year tuna auction with headline-grabbing bids — a marketing instinct that turned a sushi chain into a household name.

For Japanese diners, the honten (flagship) has a specific reputation: it's considered a notch better than the 49 other Sushi Zanmai branches, because the original location near the old market kept first-pick supply relationships. It's not a top-tier counter sushi-ya and doesn't pretend to be — it's reliably good, mid-priced, and available at any hour, which is a genuinely useful combination in a city where most good sushi requires a reservation and a fixed dinner slot.

For foreign visitors, the appeal is access. The Tsukiji Outer Market (the retail food streets that survived after the wholesale auction moved to Toyosu in 2018) is one of Tokyo's most-visited food areas, and Sushi Zanmai's flagship sits right in it with a full English menu, photo ordering, and a counter you can walk up to at 3pm or 3am. For jet-lagged travelers eating on a broken clock, the 24-hour format alone makes it worth knowing.