For a traveler, virtually everything is open on weekends from department stores to restaurants. Museums are generally open, but check with the one you want to go to, some might actually be closed on Monday's instead. The major exception would be that the Tsukiji Fish Marketr is closed on Sundays.

Yes, Tokyo is fully operational on Sundays, and for many residents, it is actually the busiest day for shopping and entertainment. Unlike some European cities where shops close on Sundays, nearly all department stores (like Isetan and Mitsukoshi), malls (like Sunshine City), and boutiques in Harajuku and Shibuya remain open, often with extended hours. Most major tourist attractions, including the Senso-ji Temple, Tokyo Skytree, and Tokyo Disneyland, are open but will experience their highest weekly attendance. Museums and gardens also stay open, though many will choose Monday as their scheduled "rest day" instead. One thing to be aware of in 2026 is that while commercial areas are thriving, many smaller, family-owned "hole-in-the-wall" restaurants or specialized craft shops in residential neighborhoods may close on Sundays. Public transportation runs on a slightly reduced "Sunday/Holiday" schedule, but in a city as efficient as Tokyo, this rarely causes significant delays for travelers. If you plan to visit a popular cafe or a themed restaurant, Sunday reservations are highly recommended due to the local crowds.