A stone lantern, a pine tree, and a coastal view.

Change your mind
Book hotels with free cancellation
Treat yourself
Sign in to save 10% or more on thousands of hotels
Sign in
Be picky
Search almost a million properties worldwide

Check availability on Kosai 4 Star Hotels

Tonight

Tomorrow

Next weekend

In two weeks

Our top choices for Kosai 4-star hotels

A modern hotel with a prominent sign, a parking area, and a pedestrian bridge.

1. Hotel Associa Toyohashi

Toyohashi

Jeanette

￥10,524 total

Nov 30 - Dec 1

A modern train station with two sleek bullet trains on adjacent tracks, a pedestrian bridge overhead, and a tall building in the background.

2. Okura Act City Hotel Hamamatsu

Naka Ward

Francisco

￥20,103 total

Nov 2 - Nov 3

3. Grand Mercure Lake Hamana Resort & Spa

Nishi Ward

Katarina

￥8,798 total

Nov 3 - Nov 4

A modern hotel room with a large city view, a flat-screen TV, a desk, and a comfortable bed with multiple pillows.

4. Hotel Arc Riche Toyohashi

Toyohashi

rogelio

￥13,492 total

Dec 1 - Dec 2

A serene indoor pool with a wooden deck and stone accents, surrounded by wooden walls and potted plants.

5. Hiranoya

Gamagori

Eric

￥21,949 total

Nov 30 - Dec 1

A modern outdoor hot tub area with a wooden deck, glass doors, and a view of the city.

6. Tennomaru

Kota

Todd

￥30,558 total

Nov 29 - Nov 30

A modern hotel room with a large bed, a small table, and a view of a lake through shoji screens.

7. Hoshino Resorts KAI Enshu

Nishi Ward

Isom

A hot tub area with a wooden deck, a seating area, and a view of trees.

8. Kaze no Tani no Iori

Kota

mitsuyo

￥85,713 total

Nov 30 - Dec 1

Save an average of 15% on thousands of hotels when you're signed in

Explore similar 5-star hotels

Many 5-star hotels have the same amenities as 4-star hotels. See all 5-star hotels in Kosai.

Hamamatsu Marriott Hotel

1-3-1 Higashi Iba Hamamatsu Shizuoka Prefecture

￥11,501

￥13,916 total

Nov 2 - Nov 3

Still don't see what you're looking for?

See all properties in Kosai.

You can also use these popular filters to refine your search.

Pool Spa Hot tub Breakfast included Waterpark

Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

Learn more about Kosai

Between the golden shores of Arai Benten Beach and the tranquil waters of Lake Hamana, visitors find perfect spots for swimming and watersports. Explore the historic Sakichi Toyoda Memorial House before visiting ancient Ogaji Temple where locals still come to pray beneath centuries-old trees.

See all hotels in Kosai

A traditional Japanese gate with a tiled roof and a sign with Japanese characters.

Top Kosai Hotel Reviews

Grand Mercure Lake Hamana Resort & Spa

10/10 Excellent

"I really enjoyed my stay here. The onsen was so nice and well maintained. They offered drinks in a lounge like area before entering the onsen and after you get out. The local tea was so good, I think it was called usuchatou (the spelling might be wrong). The rooms were nice. The breakfast was so delicious and had a big variety. We were a group of 4 and stayed in a traditional Japanese style room and as Americans it was our first time having to lay out futons so it was fun. The staff were amazing, we don’t have service here and twice they called a taxi for us after asking and were very kind. Definitely 10/10 one of my favorite hotels I’ve stayed at so far in Japan."

Explore a world of travel with Expedia

Hamanako Kanzanji Onsen Vacation Rentals

Book 4 Star Hotels in Kosai on Expedia.co.jp

Room 1

Change your mind

Treat yourself

Be picky

Check availability on Kosai 4 Star Hotels