Oiso Long Beach: Experience a Resort Getaway Close to Tokyo This Summer – Opens July 4 (Sat)

Oiso Long Beach (location: 546 Kokuhonjo, Oiso-machi, Nakai-gun, Kanagawa Prefecture; General Manager: Masuhiro Saso) will operate for 72 days from Saturday, July 4, 2026, to Sunday, September 13, 2026, as a popular summer destination for family fun.

Famed for its convenient access—just about an hour from central Tokyo—Oiso Long Beach has become a favorite destination for "micro-tourism," offering a refreshing escape close to home. In response to recent extreme summer heat, the resort will introduce a new mist cooling zone this season as part of its heatstroke prevention measures. Additionally, shaded areas by the poolside, regular public announcements encouraging hydration, and enhanced patrols by lifeguards will continue to ensure a safe and comfortable environment for all guests.

Beyond its cooling initiatives, the resort features a vast, approximately 1-kilometer-long site with panoramic views of Sagami Bay. Here, guests can enjoy a wide variety of pools, including a 140-meter-long waterslide, a wave pool, a fountain children's pool, a 500-meter-long lazy river, and a 10-meter-high diving pool.

Whether visiting with family, friends, or as a couple, guests can enjoy a unique summer resort experience surrounded by sea and sky at Oiso Long Beach.

Adjacent to the resort, Oiso Prince Hotel offers the "THERMAL SPA S.WAVE," featuring a heated infinity pool overlooking Sagami Bay, as well as natural hot springs and saunas. Together with Oiso Long Beach, it creates a perfect destination for a full-day or overnight resort stay.

Waterslide and wave pool

New Addition: "Mist Spot" Cooling Zones

As part of its countermeasures against extreme summer heat, Oiso Long Beach will debut mist cooling zones starting in the 2026 season.

These mist zones will provide a refreshing cooling effect, allowing guests to comfortably enjoy the facility even on the hottest days. In addition to the new mist spots, stylish, well-ventilated shaded areas will continue to be provided around the poolside, ensuring a comfortable and breezy environment protected from direct sunlight.

◆ Key Features

◇ Learn with Your Family! Water Safety & Lifesaving Workshop (Hosted by GOAL WIN Co., Ltd., Speed Division)

This program features a "Water Safety Class" led by former Olympic medalist Takeyoshi Matsuda and a rescue experience session conducted by Hayato Nishiyama, Japan's only professional lifeguard. Families can learn practical knowledge for enjoying water activities safely, as well as actions and rescue techniques to prevent water accidents. This engaging program raises safety awareness while creating lasting summer memories for parents and children.

Date: July 4, 2026 (Sat)

Time:

Session 1) 10:00 A.M. – 11:30 A.M.

Water Safety Class for Families

Session 2) 2:00 P.M. – 3:30 P.M.

Lifesaving Experience

Location: Oiso Long Beach "Swimming Pool"

Fee: Free of charge for each session

Eligibility: Limited to 20 pairs of parents and elementary school-aged children

Registration: Advance reservation required via the official website

◇ Answering "Where to go for summer vacation?" – The largest leisure pool resort in the Shonan area.

With nine different pool areas—including a 500-meter-long lazy river, waterslides, and children's pools—guests of all ages, from young children to adults, can fully enjoy water-based fun.

◇ Safety Monitoring by Professional Lifeguards

To ensure safe and worry-free water play, lifeguards are stationed at all pools. Regular announcements remind guests to hydrate frequently, and lifeguards actively patrol the premises as part of heatstroke prevention efforts.

◇ Comfortable Stay Combined with Hotel Accommodation, Ideal for Families with Young Children or Multi-Generational Groups

Oiso Prince Hotel is located adjacent to Oiso Long Beach, allowing guests to rest comfortably in their hotel rooms after a day of pool fun. This flexibility lets visitors tailor their experience to their needs. With restaurant dining and dinner buffets available, it's the perfect destination for a "stay-and-play" pool resort experience.

◇ Enjoy Pool Fun at Oiso Long Beach, Scenic Spa Relaxation at the Hotel, and Even Handheld Fireworks!

Experience a luxurious summer resort stay at Oiso Prince Hotel!

Play to your heart's content in the open-air pool, then relax in the spa with breathtaking ocean views. As evening falls, enjoy handheld fireworks in a dedicated on-site area. Staying at Oiso Prince Hotel allows you to fully enjoy the premium experience of Oiso Long Beach.

Safety monitoring by lifeguards, lazy river, shaded areas

Stay安心 at the resort hotel adjacent to Oiso Long Beach

Take a nap in your hotel room after tiring out from pool play

Experience handheld fireworks in front of the hotel

Oiso Long Beach Pool Overview

1. Waterslides (tube-only slides) × 2 courses

The 140-meter-long waterslides offer thrilling excitement.

The starting point, with panoramic views of the beach, is a must-see!

Course A: 139 meters long, 15-meter height difference

Course B: 140 meters long, 15-meter height difference

Starting platform: 13.2 meters above ground; Landing pool: 13.3m × 9.1m

※ Not available for guests under 120 cm in height or under 6 years of age.

2. Wave Pool

A spacious pool designed to mimic the real ocean.

Children will delight in the continuous, authentic waves.

Wave height: 0.3–0.8 m; Water depth: 0–1.4 m; Shoreline length: 200 m

※ Child zone water depth: 0–0.6 m, safe for young children.

3. Lazy River

Located at the heart of Oiso Long Beach, this popular pool lets guests relax on rafts for a resort-like experience.

One lap: 500 m; Width: 25 m; Flow speed: 0.8 m/sec

※ Approximately 15 minutes per lap when using an inflatable raft.

4. Diving Pool

A thrilling diving pool with platforms at four different heights: 1 m, 3 m, 5 m, and 10 m. The view from the 10-meter platform offers an exhilarating sense of openness!

Diving boards: 1m, 3m, 5m, 10m; Water depth: 5 m

5. Fountain Children's Pool

A fun, circular pool 20 meters in diameter with fountains and a slide, perfect for children who need floaties or are still getting comfortable in water.

Water depth: 30 cm

6. Swimming Pool

Hosts events such as kids' swimming races.

Size: 25m × 13m; Water depth: 1.2 m

7. Kids Water Paradise

A gentle large slide with two play structures, designed for younger children.

※ Available for children aged 3 and up to elementary school age (under 125 cm in height).

8. Synchronized & Swimming Pool [Hotel Guest Area]

Size: 25m × 21m; Water depth: 2 m

9. Children's Pool [Hotel Guest Area]

Water depth: 30 cm

【Operating Period】 July 4 (Sat), 2026 – September 13 (Sun), 2026

【Opening Hours】 9:00 A.M. – 5:00 P.M.

※ From July 6 (Mon) to 10 (Fri), July 13 (Mon) to 17 (Fri), September 1 (Tue) to 4 (Fri), and September 7 (Mon) to 11 (Fri), hours are 10:00 A.M. – 5:00 P.M.

【Address】 546 Kokuhonjo, Oiso-machi, Nakai-gun, Kanagawa 259-0193

【Admission Fees】

Category

Day Pass

After 2:00 PM Discount Ticket

Adults

¥4,400–¥4,900

¥2,700–¥3,000

High & Middle School Students

¥3,000–¥3,300

¥2,000–¥2,300

Elementary Students & Seniors (65+ years)

¥2,400–¥2,600

¥1,400–¥1,700

Children (ages 3–pre-elementary)

¥1,200–¥1,400

¥800–¥1,000

※ Guests staying at Oiso Prince Hotel who are not on a package plan that includes Oiso Long Beach admission can use the facility at half the regular admission price.

※ Prices include consumption tax.

【Opening Year】 July 1957 (Showa 32)

【Access】

<By Car>

・Approx. 2 km (about 5 minutes under normal conditions) from Oiso IC on the Odawara-Atsugi Road via Atsugi IC on the Tomei Expressway

・Approx. 1 minute from Oiso-Nishi IC on the Saigo Bypass

<By Train>

・Approx. 13 minutes by bus or 9 minutes by taxi (approx. ¥1,800) from Oiso Station on the Tokaido Main Line