Tokyo on a Rainy Day with a Toddler: 4 Indoor Places We Actually Go

Rain in the forecast, a toddler who has been in a stroller for three days, and a whole day to fill. If that is your morning in Tokyo, this is the guide I'd hand you.

I'm a dad living in Tokyo, and these are four indoor places I have actually taken my daughter to, at different ages. ASOBono! has been a regular since she was about one. We went to Miraikan when she was three, and to LEGOLAND Discovery Center and Unko Museum when she was five.

The short answer:

• Toddler (about 1–3) who just needs to move? → ASOBono! at Tokyo Dome City
• LEGO-loving 3- to 5-year-old? → LEGOLAND Discovery Center in Odaiba
• Preschooler who thinks poop jokes are the funniest thing ever? → Unko Museum in Odaiba
• Older sibling who wants robots and science? → Miraikan in Odaiba

Pick one, not four. A good rainy day with a toddler is one place they love, lunch before anyone melts down, and a nap.

Quick comparison

Prices change by date and demand at all four, so check before you go.

ASOBono!: the toddler's first choice

The ball pit, where every visit seems to end.

If your toddler needs to run, climb and play without anyone telling them what to do, this is the one. ASOBono! is a big indoor playground at Tokyo Dome City, split into different zones:

• HAI HAI Garden, a separate area for babies and young toddlers, away from the running big kids
• Colorful Town, with pretend shops, toy food and a cash register
• Pleasure Station, with trains, vehicles and building toys
• A large ball pit

It has grown with my daughter. At one, the baby zone was the whole visit. At five, she plays shopkeeper first, then races off to the ball pit. That's why I'd put it first for families with more than one young child.

Everyone takes their shoes off, and you leave the stroller in the parking area by the entrance, so carry a small bag with the essentials. You can't eat in the play area, but GO-FUN, the food court next door, has been our easy lunch every time.

There is no general reservation system, but rainy days bring local families too, and busy days can mean a wait or a temporary entry limit. Arriving near opening has been easiest for us.

More in our full ASOBono! guide. Prices and the date-based price calendar are on the official English information page.

LEGOLAND Discovery Center: for the little builder

City Builders, the big shared LEGO city.

This is an indoor LEGO attraction on the third floor of DECKS Tokyo Beach in Odaiba. It is not the big LEGOLAND Japan theme park, which is in Nagoya.

We went on a quiet weekday in January, when our daughter was five. Her favorite by far was Kingdom Quest, a ride where you shoot lasers at targets from small cars. She rode it three times in a row. She also spent ages at Racer Build & Test, building a LEGO car and racing it down the track. She asked to come back before we'd even left.

For a younger toddler, DUPLO Village has oversized blocks for little hands that aren't ready for the small bricks. Some rides have their own conditions, so check before you promise one.

You need a timed entry slot. Booking online at least a day ahead is cheaper (up to about 30% off) and guarantees your entry. Same-day tickets at the counter are only possible if slots are left, which is a gamble on a rainy weekend.

👉 Book tickets: Check prices on Klook

More in our LEGOLAND Discovery Center review.

Unko Museum: short, loud and very silly

MY UNKO MAKER: sit on a toilet, shout, and make your own poop character.

"Unko" means poop, and this museum on the second floor of DiverCity Tokyo Plaza is a colorful, interactive play space built around cartoon poop characters. It is not an educational museum. It is photo spots, shouting and games.

Our daughter was five. She made a sparkly pink poop at MY UNKO MAKER, and her favorite was Hop! Step! Jumpoo!, where poop characters are projected onto the floor and you stomp on them. She'd have kept going if we'd let her. She also cheered her heart out at the animal derby. Entry was quick on our visit, but one game took about 30 minutes to reach.

It's a short visit, about 60 to 90 minutes. There is no re-entry, so use the mall toilets before you go in. It's bright and loud, which is the fun of it, but a toddler who doesn't like noise or dark rooms may find parts of it a lot.

👉 Book tickets: Check prices on Klook

More in our Unko Museum review.

Miraikan: when an older sibling wants science

One of the pet-style robots. My daughter waved at it until it waved back.

Miraikan, the National Museum of Emerging Science and Innovation, is a robot and hands-on science museum in Odaiba. It's also the cheapest of the four: adults ¥630 and preschoolers free for the exhibits.

We went on a Saturday in June when our daughter was three. The pet-style robots were a big hit, but the physics, biology and space displays were a tough sell at that age. Honestly, if your kids are under four, the other Odaiba places will hold their attention better. Where Miraikan shines is with an older sibling who actually wants to read the explanations, and the English is very good: almost every exhibit has English text, plus an English audio guide app.

Two practical points. Miraikan is closed on Tuesdays. And its cafeteria, CAFETERIA BLUE, closed permanently on August 31, 2026. The museum has designated eating spaces, including the 5th-floor lobby, which also has a nursing room and vending machines, but you can't eat in the exhibition areas. Plan lunch before you go.

More in our Miraikan review. Hours and closures are on the official English visitor page.

Getting there from Tokyo Station

To ASOBono!:

With a stroller, the official barrier-free route from Korakuen is: through the ground-floor ticket gate, past LaQua, up to the 2nd floor by elevator, then the South Elevator down to the 1st floor.

To the three Odaiba places:

One rainy-day warning about Odaiba: DECKS, DiverCity and Miraikan are three separate buildings, and the walks between them are outdoors. In wind and heavy rain, that's the most tiring part of the day, so choose one and stay put.

What Locals Know

• Rain fills indoor places with local families too. Go early, and book LEGOLAND and Unko Museum online the day before rather than hoping for same-day slots.
• Pack a change of clothes and a small bag. ASOBono! is shoes-off with stroller parking outside, and you'll be carrying everything while you follow your toddler around.
• Lunch is part of the plan. GO-FUN next door for ASOBono!; the restaurants in DECKS and DiverCity for LEGOLAND and Unko; and for Miraikan, bring something or eat before, now that the cafeteria has closed.
• One place, then the hotel. If your toddler falls asleep after lunch, take the win and go back. You don't need a second attraction.

How much English will you need?

Very little. ASOBono! has an English information page, and the play itself needs no language at all, though its ticket pages are mostly in Japanese (you can simply buy at the counter). LEGOLAND has a full English site and booking, and staff generally manage in English; only the Master Builder Academy workshop is Japanese-only. Unko Museum has English booking and much of its signage is translated, and the opening video has an English option. Miraikan is the best of the four for English, with English explanations on almost every exhibit and an audio guide app.

Verdict

For a toddler, start with ASOBono!. It's central, it needs no language, and it works for babies and five-year-olds alike. If you're already in Odaiba with a preschooler, LEGOLAND Discovery Center is the safest bet and Unko Museum is the funniest hour you'll spend. Save Miraikan for when an older sibling wants science.

Whichever you choose, the best rainy day isn't the one where you see the most. It's the one where your little one plays hard, eats on time and naps well.

For the rest of your trip, see our five-day Tokyo itinerary with kids or, for older preschoolers, KidZania Tokyo.

This guide is based on our family's own visits to all four places. Prices and opening hours are as of 2026 and change, so check each official site before you go, and feel free to get in touch if you spot anything out of date.