Information for the popular pools at Seibuen Yuenchi Amusement Park in the summer of 2026. Tickets are on sale now. Like last year, they are starting the season earlier than ever. In addition, it will run until later in September too – the latest ever. They will open on weekends from end of June and the first three weeks in September, and daily, from mid-July to the end of August.
Seibuen Summer Pools General Information
For years Seibuen / Seibu Amusement Park opened their summer pools annually in July until the first week in September. However, since 2024 they have been opening earlier. And since last year they open in JUNE. It is certainly hot enough for the pool by then, in recent years. Moreover, they will open until mid-September this year, rather than early September like usual. No doubt because their rival, Tobu’s super pool, has had great success opening in June until mid-September in recent years! Generally, Seibu pools operate on rainy days, but if there is a typhoon or very heavy rain they occasionally close. They used to have a night pool on select dates from the middle of July. However, the night pool has not opened since the pandemic began.
Highlights
- Water Slider with 6 different slides of different speeds
- A wave pool
- A flowing pool
- Kids pool
- Viking Bikke Exciting Water land
- Hello Kitty Water Park
- Challenge Air Athletic
- Night Pool – in 2021, on account of the Coronavirus, it was more an “evening” pool! It closed at 7 pm. And it hasn’t been on since 2022.
Big Summer Festival
During the summer holidays, Seibu amusement park have a “big summer festival” with a beer garden, large scale water fight and fireworks. The summer pool is part of the larger big summer festival. The pool or aqua park is popular locally, but also with people from outside the prefecture. In fact, it frequently ranks on the top ten most popular pools in all of Japan. In 2022, Walker awarded it third place in their annual Walker Pool Awards. (Number one was also in Saitama). Many people commute from Tokyo and further afield too. Weekends can be very crowded.
Due to the popularity of these pools, it is recommend that you book a ticket in advance, they are on sale now. If you want to avoid the crowds, weekdays are less busy. And on a rainy weekday it’s a whole other world. Its not unusual for it to be practically empty on a rainy weekday! Also, has word may not yet have got around that this year they will open the last weekend in June, it is possible that weekend will be a lot less busy than the usual opening weekend.
2026 Seibuen Pools Information
In 2026 the pool will only open on weekends from Saturday June 27th to Sunday July 17th. They will open daily from Saturday July 18th until Monday August 31st. They will open once again on weekends and public holidays until public holiday Monday September 23rd 2026. The pools are open from 9 am to 5 pm. You can see the most up-to-date schedule here.
Cost:
The day pool pass (that is for the pool only, it does not include the amusement park) for adults and children over 15 has gone up again this year, to 3400 yen. The price for high school students is 2900 yen. Primary school aged children and people over 60 can enter the pools for 2200 yen. The fee for kindergarteners is 1500 yen. Children under 2 are free.
Please note, when they have special events on, normally over Obon, they increase the base price. Between August 8th and 16th 2026 it costs 3700 yen for an adult, 3200 yen for a teenager, 2500 yen for elementary school aged children and 2000 yen for kindergarteners. If you want a table with a parasol, ticket prices start from 5000 yen. Furthermore, if you want to enter the amusement park too it costs extra. For example, for adults it is 5200 yen. There are discounts for people with a Seibu Prince Club card.
Access
Venue: Seibuen Amusement Park Pool, 2964 Yamaguchi, Tokorozawa, Saitama 359-1145. View on Google Maps.
Seibuen pools are about a five-minute walk from Seibu Tamako Line Seibu Yuenchi Station and Seibu Line Seibuen Station. There is parking for 1200 cars. It costs 1800 yen normally, but it will probably be 2000 yen during Obon. The overflow car parks cost 1500 yen. You also have to pay 100 yen to park a bicycle!
Sat nav/ GPS: phone number 042-922-1371
For more pools in Saitama, please see this article.
Editor’s note:: r20200408. Last update May 28th 2026. Seibuen is one of only a handful of pools or aqua parks that never closed during the pandemic. They did have restrictions though. Moreover, they didn’t have their night pool either and it doesn’t appear to be on in 2024 either. Before the pandemic the pools opened until 7 pm on weekends and until 9 pm on select dates for the night pool, but unfortunately not this is not the case in 2024