If you’re visiting Yokohama with children and looking for a fun, educational activity, don’t miss the Hamagin Space Science Center (also known as Hamagin Uchuu Kodomo Center). This hands-on science museum is all about space and astronomy — perfect for curious little minds and grown-ups alike!
The Hamagin Space Science Center—officially named under a naming-rights agreement with The Bank of Yokohama—is actually operated by Yokohama City, with day-to-day management handled by a designated third‑party operator (CTC Joint Venture managed by Congre and Tokyu Community).
Located in Isogo Ward, Yokohama, the center features multiple floors of interactive exhibits, real astronaut gear, a planetarium, and even an indoor athletic gym! It’s ideal for rainy days too, since it’s almost entirely indoors.
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What You Can See and Do at Hamagin Space Science Center
The museum is designed to look like a giant spaceship, spanning from the 5th floor down to two basement levels. Each floor has a different theme with hands-on, interactive exhibits that let children and adults explore space and science through play.
Highlights by Floor:
- 5th Floor – Space Captain Room
Climb aboard a simulated command deck, try the space simulator or catch a live Science Show on weekends with bubble-blowing and air cannons. - 4th Floor – Space Laboratory (Space Research Room)
Enjoy physics-based puzzles and rolling-ball exhibits (like “Beecoro”) that demonstrate gravity and motion. - 3rd Floor – Space Training Room
Experience astronaut-like challenges: lunar jumps, “spatial transfer units,” and a “planet gym” with slides and climbing areas styled like a space station. - 2nd Floor – Space Discovery Room
Discover plasma balls, lightning demonstrations, aurora displays, and weekend science labs where kids can try simple experiments. - 1st Floor – Planetarium and Lobby
A 23 m dome shows a realistic starry sky using a projector that holds a Guinness World Record for projecting over 700 million stars. Most programs include staff-led star explanations. Elsewhere, there’s a gift shop and café.
There is even a nice play park next to the building. Re-entry to the Space Center is permitted, so you’re free to come and go as you please (Don’t lose your entry ticket!).
My child especially loved the space gym area and the planetarium. We spent more than five hours exploring everything! Although most of the explanation are in Japanese, kids will still enjoy the demonstrations, displays, exciting physical activities and hands-on experiences.
Basic information of Hamagin Space Science Center
Here are some basic information of Hamagin Space Science Center.
Opening Hours & Admission
- Opening Hours: 9:30 AM – 5:00 PM (Last admission at 4:00 PM)
- Closed: 1st and 3rd Tuesdays of each month (or the following day if a national holiday), December 29 – January 3, and occasional maintenance periods.
Admission Fees:
- Adults: ¥400
- Elementary & Junior High School Students: ¥200
- Saturdays: Free for elementary, junior high, and high school students.
Planetarium Admission:
- Adults: ¥600
- Ages 4 & up / Elementary & Junior High School Students: ¥300
Narration in the planetarium is provided in Japanese.
Location & Access
- Address: 5-2-1 Yokodai, Isogo-ku, Yokohama, Kanagawa 235-0045, Japan
- Phone: +81-45-832-1166
- Closest Station: Yokodai Station (JR Keihin-Tohoku/Negishi Line) – approximately a 3-minute walk from the station.
Facilities & Amenities
- Café: Available on-site for refreshments.
- Parking: On-site parking is available for visitors.
- Accessibility: Elevators, handrails, wheelchair rentals, and disabled stalls are provided.
- Childcare Facilities: Baby changing tables and a nursing room are available.
- Foreign Language Support: English assistance is available, but most information are provided in Japanese.
Family-Friendly Points I found at Hamagin Space Science Center
Here are some family-friendly tips I found at the facility.
You can park your stroller in the stroller parking area
The building has five floors and elevators, but the stairs are convenient for moving around. There is a stroller parking area on the first floor near the ticket booth, so I recommend parking your stroller there.
You can bring your own food; there are a lot of spots to sit down and rest
There is a small restaurant in the building offering dishes such as curry for around 400 yen, but outside food is welcome. You can also bring snacks for kids. We arrived around 9:30, skipped lunch, played for five straight hours, and then left to have a late lunch near the station.
You can check live camera on YouTube
Even more amazingly, you can watch a live camera on YouTube to see how crowded it is!
How to Get to Hamagin Space Science Center
The Hamagin Space Science Center is located in Isogo Ward, Yokohama, and is easily accessible by public transportation.
By Train:
- Take the JR Negishi Line and get off at Yokodai Station.
- From Yokodai Station (East Exit), it’s just a 3-minute walk to the center.
- The walk is stroller-friendly and clearly signposted.
It’s close from the station, but the road is quite steep.
By Car:
- Parking is available on-site (paid parking).
- Address for GPS:
5-2-1 Yokodai, Isogo-ku, Yokohama-shi, Kanagawa 235-0045 - Parking Information
Parking Lot Capacity: Approximately 70 spaces available for general vehicles.
Hours of Operation: From 30 minutes before the museum opens until 5:00 PM (last entry at 4:00 PM).
Parking Fee: ¥700 per visit.
Important Notes:
The parking lot is exclusively for visitors to the Hamagin Space Science Center. Please refrain from parking if you are not visiting the facility.
Street parking is prohibited in the surrounding area. As the number of spaces is limited, we recommend using public transportation whenever possible.
If you plan to visit in a welfare vehicle or need wheelchair access, please contact the center in advance.
Travel Time (Approximate):
From Tokyo Station: About 45–50 minutes by train
From Yokohama Station: 20–25 minutes by train
Final Thoughts on Hamagin Space Science Center
Hamagin Space Science Center is a hidden gem for families visiting Yokohama. It’s fun, educational, family-friendly and very affordable. Even without perfect Japanese, kids can enjoy the visuals and hands-on activities.
Want to discover more indoor playgrounds and theme parks in Tokyo? Click here for our full guide!
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Love space, science, and hands-on fun?
👉 For more family-friendly excitement, check out the Fujiko F. Fujio Museum — the home of Doraemon and other beloved characters!
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