Tokyo When It Rains: Indoor Plans That Don't Feel Like Settling
Rain is a near-certainty if you come in June or early July during tsuyu, the rainy season, and typhoon weather can soak you in September too. The good news is that Tokyo is built for it. Whole days can pass underground and indoors here without you feeling like you compromised, between the museums, the aquariums, and the department store basements.
Much of central Tokyo is connected by underground passages and station complexes, so you can string together shopping, food, and a museum without going out into the wet much at all. Buy a cheap clear umbrella from any convenience store and stop worrying about it.
The strongest rainy-day picks here are the ones that cost money, which is the opposite of the free-day advice. A wet afternoon is exactly when those museum and aquarium tickets earn their keep.
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teamLab Planets
Indoor, book aheadA fully indoor walk-through of water rooms and projected light, and one of the most photographed experiences in the city. Rain outside makes no difference once you are in. Book a timed slot well ahead because it sells out, and bring or wear something you can roll above the knee for the water sections.
teamLab Planets guide
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A department store depachika
Indoor, free to browseThe basement food halls of the big stores in Shinjuku, Ginza, or Shibuya are a destination in their own right when it pours. Think floor after floor of bento, sweets, and cut fruit laid out like a gallery. You can graze, buy a picnic, and stay dry for an hour without trying.

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Sumida Aquarium at Tokyo Skytree
Indoor, ticketedA calm, modern aquarium of jellyfish and penguins built into the base of the Skytree complex, all indoors and connected to a large mall. If the rain is heavy you can do the aquarium, the shops, and a meal without an umbrella. The tower view above is a gamble in bad weather, so skip it if the clouds are low.
Sumida Aquarium at Tokyo Skytree guide
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Ueno's museum cluster
Indoor, ticketedThe park edges are ringed with serious museums, including the national museum and science and art collections, all a short dash apart. On a wet day you pick one or two and go deep. They charge admission, but this is precisely the day to spend it rather than fight the weather outside.

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Nakamise-dori under cover
Partly coveredThe market street up to Senso-ji is partly covered, and the temple's main hall gives you somewhere dry to duck in. It is not a full indoor day, but it lets you still tick off Asakusa in the rain. Wet stone gets slick, so watch your step around the temple steps.
Nakamise-dori under cover guide
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Shibuya and Ginza shopping complexes
IndoorThe big retail buildings in Shibuya and Ginza link up through stations and walkways, so you can shift between streetwear floors, design stores, and cafes without surfacing. Even if you buy nothing, the buildings themselves and their top-floor views and restaurants make for a dry, easy afternoon.

Photo credits
Photos: Kakidai, Ximonic (CC BY-SA 4.0); Kakidai, Bernard Gagnon (CC BY-SA 3.0) via Wikimedia Commons.
Pick one ticketed indoor anchor, a museum or an aquarium, then let a depachika and a connected mall carry the rest of the day. A rainy Tokyo day is barely a downgrade if you plan it around the underground.
Tokyo When It Rains: Indoor Plans That Don't Feel Like Settling: FAQs
The rainy season runs from around early June into mid-July, with frequent showers and high humidity. September can also bring heavy rain from passing typhoons. The rest of the year sees rain but rarely for days on end.
Largely, yes. Central districts connect through underground passages and station complexes, so you can move between shopping, food, and some attractions with minimal time outside. A convenience-store umbrella covers the gaps.
It is a strong rainy-day choice since it is entirely indoors, but it needs a booking ahead of time. Part of the experience is wading through water, so the rain outside is irrelevant once you are in.
It is the food hall in the basement of a department store, packed with prepared food and sweets. On a wet day it is a warm, dry place to graze, assemble a meal, and kill an hour without an umbrella.
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