Enjoy All the Fun at Hakone Kowakien Yunessun – A Unique Hot Spring Amusement Park in Japan!
Rain or shine, summer or winter—Yunessun is a hot spring amusement park in Hakone that you can enjoy year-round! With both swimsuit-friendly spa zones and traditional hot spring baths, it’s a perfect destination for families, couples, and friends.
The spacious spa areas, both indoors and out, include waterslides, a lazy river, and quirky themed baths like the wine bath and green tea bath. There’s even a breathtaking open-air bath with panoramic views of the Hakone mountains. Attractions abound for guests of all ages!
Just Opened! “Rocky’s Splash” – A Thrilling Waterslide Experience with Rainbows & Mountain Views
In spring 2025, Yunessun welcomed its newest attraction: “Rocky’s Splash,” a thrilling waterslide offering two totally different sliding experiences.
The Boshat Line is an open-air slide that lets you take in sweeping views of the Hakone mountains as you twist and turn through exciting 360° curves. You’ll feel the rush of the wind as you descend—an exhilarating ride from start to finish!
The Colorful Line is a closed-tube slide that features a special design allowing natural light to enter the tunnel and create dazzling rings of rainbow-colored light along the slide. As you plunge into the darkness, these brilliant patterns swirl around you, making it feel like you’re warping through space and time.
Both slides use warm water, so they’re open year-round. The gentle run-out landing makes them safe and fun for children (minimum height: 105 cm). A thrilling experience for both kids and adults—don’t miss your chance to try this brand-new waterslide!
Boshat Line - Soar through the air on this open slide with panoramic views of Hakone’s mountains.
Colorful Line - Glide through a tunnel of rainbow light in this dazzling enclosed slide.
Recommended Places to Stay – Enjoy Unlimited Access to Yunessun!
Want to make the most of your time at Yunessun? Stay at one of these hotels and enjoy unlimited entry during your entire stay! Find the perfect accommodation to match your travel style.
Hotel Kowakien– A Family-Friendly Hot Spring Resort
Opened in July 2023, Hotel Kowakien celebrated its grand opening as a brand-new, family-friendly hot spring resort with good access to Yunessun, located just across the way.
With its convenient location, it’s an ideal place for families to stay and play.
Enjoy buffet-style dining with about 60 Japanese, Western, and Chinese dishes for breakfast and dinner—including steak, sushi, the hotel’s original Kowakien ramen, and chicken curry. Unlimited drinks such as beer, juice, and coffee are also available.
There are kid-friendly menus, child-sized utensils, and a play area, making it easy for families with young children to relax and have fun.
Eat well, play hard, and make lasting memories together at this welcoming and convenient resort.
Click here for room options and plans
Hakone Kowakien Ten-yu – Tranquility and Panoramic Views from the Open-Air Baths
For a more luxurious getaway, Hotel Ten-yu offers refined elegance with private open-air hot spring baths in every room.
The hotel’s large public baths include “UKIGUMO,” where you can soak in the sky, and “KURUMAZAWA,” surrounded by trees and seasonal scenery.
Guests also enjoy unlimited access to Yunessun throughout their stay—perfect for a balance of relaxation and adventure.
After a day of soaking and exploring, savor a premium buffet dinner and breakfast made with carefully selected ingredients, or opt for a breakfast-only plan to suit your itinerary.
Click here for room options and plans
Mikawaya Ryokan – A Historic Retreat Surrounded by Nature
Founded in 1883, Mikawaya Ryokan is a beloved historic inn with over 140 years of tradition. It has welcomed cultural icons such as Yumeji Takehisa, the Yosano couple, and even Sun Yat-sen. The main building’s nostalgic charm has earned it recognition as a registered tangible cultural property.
Dine on beautiful Japanese cuisine centered around hot pot dishes, crafted with seasonal ingredients under the supervision of Hotel Ten-yu’s executive chef.
Choose from rooms in the annex with tatami twin beds or ones with private open-air baths. During your stay, enjoy unlimited access to Yunessun.
A perfect balance of traditional atmosphere and active fun.
Note:The Main Building is currently undergoing renovation until around December 2025.
Click here for room options and plans
Miyama Furin – A Tranquil Hideaway in the Woods
Simple and serene, Miyama Furin offers a new kind of hot spring stay—with a light breakfast included and a relaxed, self-service style that gives you the freedom to enjoy Hakone at your own pace.
All rooms feature tatami flooring, and the peaceful open-air bath invites you to unwind in natural surroundings. A convenience store on-site offers snacks and drinks, and guests can enjoy meals at the restaurants inside Yunessun.
Breakfast includes bread, salad, coffee, and juice—served in a relaxed setting or enjoyed in your room.
With unlimited Yunessun access throughout your stay, this budget-friendly inn offers the perfect mix of nature, hot springs, and fun!
Click here for room options and plans
Fujino Kirameki Fuji Gotemba – Luxurious Glamping with a View of Mt. Fuji
Want to enjoy the great outdoors without giving up comfort? Just beyond Hakone, Fujino Kirameki offers a luxury glamping experience with breathtaking views of Mt. Fuji.
Each stylish cabin comes with a spacious private deck and a fire pit—perfect for relaxing under the stars. For dinner, enjoy a full-course BBQ set with salad, soup, bread, and a hearty main dish. Your field attendant will deliver everything you need, so you can cook at your own pace and enjoy the moment.
The property also features a private bathhouse with views of Mt. Fuji, available for one use per stay—an unforgettable way to unwind after a day of adventure. Cabins are fully equipped with hotel-like comforts, including air conditioning and private bathrooms.
Best of all, your stay includes unlimited access to Yunessun, making this the perfect getaway for those who love both nature and hot springs.
