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Free things to do in Tokyo on a rainy day

Official sources checked Oct 5, 2026

Everything here is under a roof and costs nothing. Check the free day on each card: some of these museums are free only at certain hours.

Tokyo

Always free in Tokyo8

Open to everyone, every day they are open. No ticket to buy.

Illustration: Tokyo Metropolitan Government Building observatoriesFREE

Tokyo Metropolitan Government Building observatories

Shinjuku
Always freeIndoorGood with kidsViewsArchitecture

Two observation rooms on the 45th floor of city hall, 202 meters up, with no ticket desk at all. On a clear day the view runs from the Skytree to Mount Fuji.

  • West windows for Mount Fuji on clear winter mornings
  • The public piano in the South room, played by visitors
  • Southeast side for Meiji Jingu's forest and Shinjuku Gyoen
Free when
Always · South room 9:30–22:00 (last entry 21:30), closed 1st and 3rd Tuesday. North room 9:30–17:30, closed 2nd and 4th Monday, and open until 22:00 when the South room is shut. Both closed 29–31 Dec, 2–3 Jan and on building inspection days.
Free for whom
Everyone
Reservation
No reservations taken. Expect a 20 to 30 minute line for the dedicated elevator on the ground floor of Main Building No. 1, after a bag check.
Time needed
45 min to 1h
How to get there
Toei Oedo Line to Tochomae, which exits inside the complex, or a 10 minute walk from the West Exit of JR Shinjuku
Worth it? Yes.The best free view in Tokyo and the reason you can skip a paid deck. Go about 40 minutes before sunset and stay for the lights. Fuji shows mostly on cold, dry mornings from December to February, on the west side.
Source: Tokyo Metropolitan Government, Bureau of Finance · checked Oct 5, 2026Open in Maps
Illustration: Ad Museum TokyoFREE

Ad Museum Tokyo

Shiodome
Always freeIndoorArtHistoryLocal life

Japan's only advertising museum, in the basement of the Caretta Shiodome tower. It runs from Edo-period shop prints to decades of TV commercials you can watch on screens.

  • Edo-period woodblock flyers for kimono shops
  • Wall of postwar posters for beer and cosmetics
  • Booths playing vintage TV commercials
Free when
Always · Tue–Sat 12:00–18:00. Closed Sundays and Mondays, and it shuts now and then between shows.
Free for whom
Everyone
Reservation
Not needed
Time needed
45 min to 1h
How to get there
Toei Oedo Line or Yurikamome to Shiodome, or 5 minutes on foot from JR Shimbashi
Worth it? Yes.A good rainy afternoon stop and much better than it sounds. The old commercials need no Japanese to enjoy. Note the late start: nothing happens before noon.
Source: The Ad Museum Tokyo · checked Oct 5, 2026Open in Maps
Illustration: Meguro Parasitological MuseumFREE

Meguro Parasitological Museum

Meguro
Always freeIndoorGood with kidsLocal lifeHistory

Two floors of parasites in jars, founded by a doctor in 1953 and still a research institute. The star is an 8.8 meter tapeworm, displayed next to a ribbon of the same length that you can unroll.

  • The 8.8 meter tapeworm on the second floor
  • Hand-drawn research notebooks of the founder
  • Parasite T-shirts in the tiny shop upstairs
Free when
Always · Wed–Sun 10:00–17:00. Closed Mondays and Tuesdays (open if a holiday, then closed the next weekday) and over New Year.
Free for whom
Everyone. Entry is free and there is a donation box.
Reservation
Not needed
Time needed
30 to 45 min
How to get there
JR Meguro, West Exit, 12 to 15 minutes on foot down Meguro-dori, or any bus from the station to Otori-jinja-mae
Worth it? Yes.Small, strange and memorable. Not for the squeamish, and oddly popular for dates. Drop a coin in the box, since donations are what keep it free.
Source: Meguro Parasitological Museum · checked Oct 5, 2026Open in Maps
Illustration: Bank of Japan Currency MuseumFREE

Bank of Japan Currency Museum

Nihonbashi
Always freeIndoorGood with kidsHistory

The central bank's own museum of money, across the street from its headquarters. It covers everything from ancient coins and Edo gold plates to today's banknote security tricks.

  • Large oval gold oban coins from the Edo period
  • Feel the weight of 100 million yen
  • Magnifiers showing the hidden details on banknotes
Free when
Always · Tue–Sun 9:30–16:30 (last entry 16:00). Closed Mondays (open when Monday is a holiday) and 29 Dec–4 Jan. In 2026 it is also closed on 20, 21 and 27–29 October.
Free for whom
Everyone
Reservation
Not needed. There is a bag check at the door.
Time needed
45 min
How to get there
Hanzomon Line to Mitsukoshimae, exit B1, 1 minute. Ginza Line exit A5, 2 minutes.
Worth it? Yes.Better than a bank museum has any right to be, and well signed in English. Try lifting the bundle that weighs the same as 100 million yen in notes. It pairs well with the East Gardens, a 15 minute walk away.
Source: Bank of Japan Currency Museum · checked Oct 5, 2026Open in Maps
Illustration: IntermediathequeFREE

Intermediatheque

Marunouchi
Always freeIndoorGood with kidsArtHistoryArchitecture

The University of Tokyo's scientific collections, laid out in old wooden cabinets inside the former Central Post Office beside Tokyo Station. Skeletons, minerals, stuffed birds and instruments, shown more like an art installation than a classroom.

  • Whale and giraffe skeletons in the long gallery
  • Century-old wooden cabinets from university labs
  • KITTE roof garden upstairs, facing Tokyo Station
Free when
Always · Tue–Sun 11:00–18:00, until 20:00 on Fridays and Saturdays. Closed Mondays (Tuesday instead when Monday is a holiday) and at year end, with occasional extra closures.
Free for whom
Everyone
Reservation
Not needed
Time needed
45 min to 1h
How to get there
Tokyo Station, Marunouchi South Exit. It is on floors 2 and 3 of the KITTE building, entered from the 2nd floor.
Worth it? Yes.One of the best free rooms in the city, and five minutes from the Shinkansen platforms. Afterwards take the escalators to the KITTE roof garden on the 6th floor for a free look down at the red brick station.
Source: Intermediatheque, JP Tower Museum · checked Oct 5, 2026Open in Maps
Illustration: Tokyo Fire MuseumFREE

Tokyo Fire Museum

Yotsuya
Always freeIndoorGood with kidsHistoryLocal life

The Tokyo Fire Department's museum, above Yotsuya fire station. Old engines fill the basement, Edo firefighting gear is upstairs, and children can climb into a real helicopter.

  • Vintage fire engines parked in the basement
  • Sit in the cockpit of a rescue helicopter
  • Edo-period firemen's coats and standards
Free when
Always · Tue–Sun 9:30–17:00 (last entry 16:30). Closed Mondays (open if a holiday, then closed the next weekday) and 29 Dec–3 Jan.
Free for whom
Everyone
Reservation
Not needed
Time needed
1h
How to get there
Marunouchi Line to Yotsuya-sanchome, exit 2, which opens into the building
Worth it? Yes.The best free hour in Tokyo with small children, and decent without them. English labels are thin, but fire engines explain themselves. Start in the basement.
Source: Tokyo Fire Department · checked Oct 5, 2026Open in Maps
Illustration: Sumo MuseumFREE

Sumo Museum

Ryogoku
Always freeIndoorHistoryLocal life

One room on the ground floor of the Kokugikan arena, run by the Japan Sumo Association. It shows ceremonial aprons, woodblock prints and ranking sheets, with the display changed three times a year.

  • Embroidered ceremonial aprons worn by past champions
  • Edo-period woodblock prints of wrestlers
  • Portraits of every yokozuna along the wall
Free when
Always · Mon–Fri 10:00–16:30 (last entry 16:00). Closed weekends and national holidays, with a few exceptions, and at year end. During the Tokyo tournaments in January, May and September it opens daily 12:30–16:00 but only to people holding a tournament ticket.
Free for whom
Everyone, outside tournament days. On tournament days, ticket holders only.
Reservation
Not needed. Check the museum calendar, since it closes between exhibitions.
Time needed
20 to 30 min
How to get there
JR Sobu Line to Ryogoku, West Exit, 2 minutes on foot
Worth it? Depends.Only for people who already care about sumo. It is a single 150 square meter room, labels are mostly in Japanese, and you do not get to see the arena. Combine it with a walk around Ryogoku, where wrestlers go shopping in their robes.
Source: Nihon Sumo Kyokai · checked Oct 5, 2026Open in Maps
Illustration: Toyosu Market and the tuna auctionFREE

Toyosu Market and the tuna auction

Toyosu
Always freeBooking recommendedIndoorGood with kidsFoodLocal life

The wholesale fish market that replaced Tsukiji in 2018. Visitors walk glassed-in corridors above the trading floors, and early risers can look down on the frozen tuna auction.

  • Rows of frozen tuna and buyers' hand signals
  • Life-size model of the biggest tuna ever sold here
  • Rooftop lawn with a view across the bay
Free when
Always · visitor corridors 5:00–17:00 on market days. Closed Sundays, national holidays and extra market holidays, which often fall on Wednesdays. The rooftop lawn is open 5:00–23:00, including closed days.
Free for whom
Everyone
Reservation
None for the upper corridor windows. The lower viewing deck, closer to the tuna, is by advance application and lottery on the market's website.
Time needed
1h to 1h30
How to get there
Yurikamome to Shijo-mae, linked to the buildings by covered walkways
Worth it? Depends.Go only if you will be there by about 5:45, since the auction is over within the hour and after that you are looking at an empty floor. It is clean and distant compared with the old market, so if fish at dawn does not excite you, sleep in and go to Tsukiji for breakfast. Check the market calendar before setting an alarm.
Source: Tokyo Metropolitan Central Wholesale Market · checked Oct 5, 2026Open in Maps

Free on certain days, or for certain people2

Mostly museums. The free window, who it applies to and the booking rule are on each card.

Illustration: National Museum of Western Art, second Sundays¥500FREE

National Museum of Western Art, second Sundays

Ueno
Free on certain daysIndoorGood with kidsArtArchitecture

Japan's national collection of European art, from Rodin bronzes to a room of Monets, in a building by Le Corbusier that is a UNESCO World Heritage site. The permanent collection is free one Sunday a month.

  • Monet's Water Lilies in the upstairs gallery
  • Rodin's Gates of Hell in the free forecourt
  • Le Corbusier's top-lit central hall and ramp
Free when
Free on the 2nd Sunday of every month (Kawasaki Free Sunday), plus 18 May and 3 November · 9:30–17:30, last entry 30 minutes before closing. Covers the permanent collection only.
Free for whom
Everyone on free days. On any open day: high school students and younger, under-18s, and visitors aged 65 or over, with ID.
Reservation
Not needed for the permanent collection.
Time needed
1h to 1h30
How to get there
JR Ueno, Park Exit, 1 minute on foot
Worth it? Yes.An easy win if your trip includes a second Sunday. Any other day, the Rodin sculptures in the forecourt, including The Thinker and The Gates of Hell, are outside the ticket line and free.
Source: National Museum of Western Art · checked Oct 5, 2026Open in Maps
Illustration: Tokyo National Museum, under 18 and over 70¥1,000FREE

Tokyo National Museum, under 18 and over 70

Ueno
Free on certain daysIndoorGood with kidsArtHistory

The country's biggest museum, with samurai armor, swords, screens and Buddhist sculpture across several buildings. The regular galleries are free for anyone under 18 or over 70, whatever passport they hold.

  • Samurai armor and swords in the Honkan
  • Gallery of Horyuji Treasures, dim and nearly empty
  • Painted folding screens, changed every few weeks
Free when
Conditional · Tue–Sun 9:30–17:00, until 20:00 on Fridays and Saturdays. Closed Mondays. Free for everyone on a few set dates: in 2026 these were 19 May, 21 September and 3 November.
Free for whom
Under-18s and school students up to high school, and adults over 70, with proof of age. Everyone else pays except on the free dates. Special exhibitions always cost extra.
Reservation
Not needed. Show a passport at the gate for the age-based free entry.
Time needed
2h
How to get there
JR Ueno or Uguisudani, 10 minutes on foot through Ueno Park
Worth it? Yes.If you are travelling with teenagers or grandparents, this is the best value in Tokyo. For everyone else, 3 November is the date to aim for. Start in the Honkan, the main building, and do not try to see all of it.
Source: Tokyo National Museum · checked Oct 5, 2026Open in Maps

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