Ryogoku is Tokyo's sumo town — the Kokugikan arena, a free Sumo Museum, chanko restaurants — and since March 31, 2026 the renovated Edo-Tokyo Museum is open again (¥800, kids free). A local half-day plan from the Disney area with the January 2027 tournament dates, museum hours and closed days, the Hokusai Museum, and the ¥341 all-JR route from Maihama.
Tsukiji's outer market is still Tokyo's best morning of sushi, tamagoyaki and grilled seafood — and only about 25 minutes from Maihama via Hatchobori. When it is actually open (9:00–14:00 core hours; closed Sundays, holidays and most Wednesdays), the no-eating-while-walking etiquette, stroller storage, cash tips, and how to pair it with Tsukiji Hongwanji temple or the Toyosu onsen.
The one 'old Japan' day most Disney-bound families want: Senso-ji temple and the Kaminarimon gate, Nakamise street snacks, kimono rental, a tea ceremony, and a free observation terrace — plus the river boat to Odaiba. Realistic routes from Urayasu (¥252, one transfer) and Maihama, child-friendly timing, and what to skip.