Fuji Yusui no Sato Aquarium
An aquarium devoted to freshwater fish near Lake Yamanaka, run on spring water from Mount Fuji.
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Fuji Yusui no Sato Aquarium
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An aquarium devoted to freshwater fish near Lake Yamanaka, run on spring water from Mount Fuji.
The side-view tank is a single pane of glass onto an outdoor pond, with tatami in front to lie down on.
MoreWhat kind of place
The aquarium opened on April 25, 2001 as a prefectural facility, and Yamanashi ran it directly until 2008; from 2009 it has been managed by the company Kikyoya under a designated-manager contract. 2026 marks its 25th anniversary, and at the end of February that year it had 106 species and 6,087 animals on display, with freshwater fish as its specialty.
With kidsThe part that matters
The side-view tank can be watched lying down: shoes come off at the tatami, and sturgeon and rainbow trout drift past at eye level.
At the center another tank holds thousands of fish in two rings, with a tunnel passing underneath. Low tanks sit on the floor, and every high one has a step.
At times doctor fish nibble your fingers, and upstairs (partly remade in July 2026) there are cameras you move to follow a fish. It is small, so a favorite tank can be seen twice.
By age0-1 / 2-3 / 4-6
- Ages 0-1At this age the big tanks do the work: one family's son, who had only just started walking, found the big fish easy to see and pointed at them in excitement. The tatami at the side-view tank takes babies who cannot walk yet, and on that family's 2019 visit the same boy happily toddled all over the wide wooden deck outside upstairs.
- Ages 2-3Two and three can go either way here: the corridors are dim, and one family's son of about two or three, visiting on a rainy day, worried that a crab would pinch him and in the end had to be carried by his father because he was scared. One family found that a touch-panel corner, where fish are learned on a screen, held a small child who could no longer stand still at a tank.
- Ages 4-6One family with a child this age found it more interesting than a building this small looks. This is the age for the drawing corner, listed as a place to draw a fish on a computer, and for the question box — write a question, drop it in, and a keeper's answer goes up on the board upstairs. Part of the upstairs, the microscope corner included, was remade as "Fujisui Lab" in July 2026, so check on the day what is there now.
By weatherRain, heat, cold
- Rainy dayRain changes little inside, because the main route is indoors, though rainy days in the summer holidays are the most crowded. The time you would have spent outside goes upstairs: the theater shows short films (new ones were announced for July 2026), and a 2019 account describes walking in and out freely and a shoes-off kids' space with fish soft toys and picture books, so check on the day what is there now.
- Hot dayHeat is when the building repays you: the tanks run on Fuji groundwater at about 12°C, cool enough to fog the glass, and the village itself sits high enough to be cooler than most of Yamanashi. Outside, the wading pool is filled from 70 meters down and holds 12°C all year.
- Cold dayCold changes the outside more than the inside, since the wading pool is a summer thing while the building is not. Winter weekday mornings can be nearly empty — one visitor on a winter weekday morning in February 2019 counted about five cars in the lot, though weekdays can also fill with groups — and on a morning like that a tank can be watched for as long as a child wants to stand in front of it.
How was it with your kids?
Not greatGreat
Family checks✓ easy for your family
- ElevatorElevator：yes
- Stroller OKStroller friendly：not checked
- RentalStroller rental：not checked
- NursingNursing space：with conditionsconditions
- ChangingDiaper changing table：yes
- Diaper binDiaper disposal bin：none
- Family WCFamily restroom：with conditionsconditions
- Kids' toiletKids' toilet seat & step stool：none
- Own foodOutside food allowed：none
- EnglishEnglish support：not checked
Tap a mark for details.
Not yet checked: 2
Lost-child support, Official family-friendly certification
Green = we confirmed it. Gray = not checked yet. Gray with a line through = the place does not have it.
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Where to go next
With a baby (0–1)
- Oshino HakkaiStroller friendlyDiaper changing tableFamily restroom10 min walkOshino Hakkai is a set of eight ponds fed by Mount Fuji's underground springs.
- Fuji-Q HighlandAmusement parkStroller friendlyNursing spaceDiaper changing table5.3 kmAn amusement park at the foot of Mount Fuji, with big coasters and Thomas Land.
- Koshu Hoto Kosaku KawaguchikoHoto noodle restaurantDiaper changing tableFamily restroom7.5 kmA restaurant for hoto wheat noodles, with 250 seats around sunken hearths and kotatsu tables.
Where it is
The address is 3098-1 Shibokusa, Oshino-mura, Minamitsuru-gun, Yamanashi, inside a park called Sakana Park.source
Before you go
- Eating and drinking are not allowed inside the building, and there is no restaurant in the aquarium or anywhere else in Sakana Park, so bring lunch — the building alone takes about an hour (one review site's tally has one to two hours as the most common stay), and you eat outside, where the park has table benches and vending machines.
- The aquarium is closed on Tuesdays (when a Tuesday is a public holiday it opens, and closes the next day instead), as well as over the year end (December 28 to January 1 in most listings; the official site gives December 30); from July 21 to August 31 it opens every day.
- The summer school holidays are crowded, rainy days more so, and weekdays can also fill with groups, though even in busy periods before 11:00 and after 15:00 stay calmer. When the parking lot fills you may have to wait to get in; the official top page links to the current crowd and parking status.
- No nursing room stands open: you ask at the reception desk and one is prepared for you, and it is not women-only: fathers may come in, except into the private booth. Inside there is no sink, no bin for used diapers and no hot water for formula, so carry a thermos and take the diapers away with you; a stroller will not fit in either, and waits at the door.
- If your child is going to play in the park's wading pool, a change of clothes is worth packing, and the day after rain the ground can turn muddy, so wet wipes for stroller tires earn their place.
- The fishing class is booked by telephone in advance, while the weekend backyard tour (first 10 per session) is signed up for on the day at the first-floor desk, and the feeding on the spot.
- Photography with a flash or a light is prohibited, because the fish are startled into the glass, and pets are not admitted (assistance dogs excepted).
Sources and evidence (36)
- Baby facilities are registered on the first floor only: one nursing room and two diaper-changing tables.source
- The nursing room has no hot water for making up formula, and it is not women-only — apart from the private booth, fathers may go in too.source
- The nursing room is not standing open; you ask at reception and it is prepared for you.source
- A room for nursing is lent out if you ask at the entrance of the aquarium.source
- An accessible restroom is on the first floor of the building, with others in Sakana Park and in the general parking lot.source
- The aquarium is indoors, so it can be walked whatever the weather is doing.source
- There is no bin for used diapers and no sink in the nursing room area.source
- No child toilet seat is registered, though a visitor in 2017 posted that the women's restroom had one.source
- The second floor is reached by the stairs or by elevator.source
- Eating and drinking inside the building are declined by the aquarium, as is smoking.source
- Admission for an adult is 420 yen.source
- Open 9:00 to 17:00 from October to June, and 9:00 to 18:00 from July to September.source
- Closed on Tuesdays (the next day when that Tuesday is a public holiday) and on December 30.source
- From July 21 to August 31 the aquarium opens every day, Tuesdays included.source
- Closed Tuesdays (the next day when the Tuesday is a public holiday) and December 28 to January 1; open every day July 21 to August 31.source
- In Jalan's tally of reviewers' own reports, one to two hours is the most common length of stay.source
- The building is small, so an hour is enough to finish it.source
- A visitor with a five-year-old finished in 30 minutes to an hour.source
- Advance booking is needed only for the fishing class, and it is made by telephone.source
- Feeding and the backyard tour are signed up for on the spot; the backyard tour takes the first 10.source
- The address is 3098-1 Shibokusa, Oshino-mura, Minamitsuru-gun, Yamanashi, inside a park called Sakana Park.source
- The aquarium says there is no restaurant inside it or anywhere in Sakana Park.source
- Pets are not admitted to the grounds.source
- Photography with a flash or a light is prohibited inside, because the fish are startled into the glass.source
- The aquarium warns that the summer school holidays are crowded, rainy days especially.source
- Even in busy periods, before 11:00 and after 15:00 are calmer for viewing.source
- When the parking lot is full, you may have to wait before entering.source
- The official top page warns that weekdays can be crowded with groups.source
- The official top page carries live indoor and parking congestion notices.source
- Weekend backyard tours hand out tickets at the first-floor reception, 10 people per session.source
- There is no restaurant for lunch, so you eat nearby or bring a packed lunch.source
- Sakana Park has restrooms, vending machines and table benches.source
- The day after rain the ground in Sakana Park turns muddy; shoes that can get dirty and a wipe for stroller tires help.source
- Wet wipes for wiping stroller tires were useful.source
- A stroller does not fit into that nursing room, so it is left outside.source
- Sakana Park has a wading pool; one family with two small children found a change of clothes essential.source
Basics
- Fee: Admission for an adult is 420 yen.source
- Hours: Open 9:00 to 17:00 from October to June, and 9:00 to 18:00 from July to September.source
- Booking: Advance booking is needed only for the fishing class, and it is made by telephone.source
Once you've decided
evidence & sources (8)
- mamamap.jp: Nursing space, Diaper disposal bin, Kids' toilet seat & step stool
- Official: Outside food allowed
- barrier-free-map.com: Family restroom
- barrier-free.net: Diaper changing table
- betakichiblog.com: Elevator
- morinonakanosuizokukan.kikyouya.co.jp: Indoor / outdoor
- Official: main site
| Nursing space | Yes | Baby facilities are registered on the first floor only: one nursing room and two diaper-changing tables. | Web-checked | checked Jun ’26 | mamamap.jp |
|---|---|---|---|---|---|
| Diaper changing table | Yes | Web-checked | checked Sep ’26 | barrier-free.net | |
| Family restroom | Yes | An accessible restroom is on the first floor of the building, with others in Sakana Park and in the general parking lot. | Web-checked | checked Sep ’26 | barrier-free-map.com |
| Stroller friendly | Not checked yet | ||||
| Lost-child supportExtra info — guide only | Not checked yet | ||||
| Indoor / outdoor | Indoor | Web-checked | checked Jun ’26 | morinonakanosuizokukan.kikyouya.co.jp | |
| Diaper disposal bin | No | There is no bin for used diapers and no sink in the nursing room area. | Web-checked | checked Jun ’26 | mamamap.jp |
| Kids' toilet seat & step stool | No | No child toilet seat is registered, though a visitor in 2017 posted that the women's restroom had one. | Web-checked | checked Jun ’26 | mamamap.jp |
| Elevator | Yes | Web-checked | checked Jan ’25 | betakichiblog.com | |
| English support | Not checked yet | ||||
| Outside food allowed | No | Web-checked | checked Sep ’26 | morinonakano-suizokukan.com | |
| Official family-friendly certificationExtra info — guide only | Not checked yet |
Reviews
Reviews