Tokyo Summerland in Akiruno, Tokyo fully opens its outdoor pool area on Saturday, July 4, 2026. The lineup includes the popular adventure pool "MONSTER STREAM," the water attraction "DEKASLA," the water slide "Towers Rock," and "dobon." Surrounded by water and greenery, the park invites visitors to enjoy a summer adventure.
MONSTER STREAM
Tokyo Summerland's adventure pool
Tokyo Summerland's signature attraction, "MONSTER STREAM," opens again this year.
A combination of the park's popular wave pool and lazy river, it is an adventure-style pool with a new kind of sensation. Surrounded by nature and designed to feel like a mountain stream, its monster-sized currents can be ridden over using a dedicated inner tube.
Story
Lush green mountains thick with trees. A valley enclosed by high, sheer rock walls. The sound of water grows lower and louder. People whisper that "something lives in this gorge." Step into the stream and a powerful flow of water suddenly comes rushing in. Strong and ever-changing as if alive, the current is "like a monster that dwells in the water."
Guests hold on to a dedicated inner tube and set off downriver, taking on an exciting adventure against the monster-like current.
Features
This pool merges the characteristics of a wave pool and a lazy river. Riding over the waves and currents created by large volumes of released water with a dedicated inner tube offers a fresh new experience.
Facility information
- Pool length: approx. 210 m
- Channel width: 6 m
- Water depth: from 1.0 m (varies with the waves)
- Water surface area: 1,260 m²
- How to use: a dedicated inner tube is required
- Eligibility: height 130 cm or taller, age 64 or under, with sufficient swimming ability (the number of laps and the number of people riding at one time are limited)
- Fee: included with the 1-Day Pass
Summer Highlights at Tokyo Summerland
DEKASLA
The large "DEKASLA" is a 4-to-5-person rubber raft attraction that slides down a huge course. It is one to enjoy with family or a group.
Towers Rock
A large rock tower stands at Tokyo Summerland, with dinosaur fossils placed here and there. From a height of 20 m, ride a dedicated rubber raft and take on two types of water slides.
dobon
A new experience where you drop into the water with a "dobon!" splash. Try this new-sensation water slide.
Aqua Fan
A total of 1.2 tons of water suddenly falls from a large barrel overhead. Make the most of this varied water-play area.
The "LANDERS" Lifeguards in New Uniforms
Tokyo Summerland's lifeguards, "LANDERS," watch over the safety and smiles of guests throughout the vast pool area. This season they wear renewed uniform T-shirts.
The wear offers strong quick-drying performance and freedom of movement in the water, supporting the lifeguards' work as they monitor the waterside and respond to changing weather. The long-sleeve type also helps with sun protection and reducing fatigue. Through the work of "LANDERS," the park aims to share the importance of waterside safety.
Tokyo Summerland Operating Information
The outdoor pool area operates from Saturday, July 4 to Monday, October 12, 2026 (national holiday).
Closed days
September 24, 25, 28-30; October 1, 2, 5-9; and from October 13 onward.
1-Day Pass
- A "1-Day Pass" (with a designated visit date) is required for admission. Purchase an electronic ticket in advance or buy one at a nearby convenience store.
- Tickets go on sale from 12:00 AM one week before the visit date, via the electronic ticket sales site or at convenience stores.
- The number of tickets is limited each day, and sales end once the daily limit is reached.
- No same-day tickets are sold at the park's ticket counter.
Parking fee
Passenger car, 1 vehicle: 1,500 yen on weekdays / 2,000 yen on weekends and holidays, as well as August 10 and August 12-14.
Access
- By train and bus: about 35 minutes by local bus from JR / Keio Hachioji Station, or about 10 minutes by local bus from Akigawa Station on the JR Itsukaichi Line.
- By car: about 8 km from the Hachioji IC on the Chuo Expressway (use the 2nd exit when coming from central Tokyo), or about 0.5 km from the Akiruno IC on the Ken-O Expressway.
