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Hotels in Kosai

October 2026
8
November 2026

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This weekend
Oct 9 - Oct 11
Next weekend
Oct 16 - Oct 18

Where to stay in Kosai?

A buffet line with various food items and condiments.
A hotel room with a bed, a desk with a telephone, a television, and a window with curtains.
A multi-story hotel with a green roof and numerous windows.
A hotel lobby with seating areas, a reception desk, and a coffee machine.

1. Hotel Route Inn Hamanako

Hotel Route Inn Hamanako
Kosai
$75
$82 total
Nov 8 - Nov 9
Hotel Route Inn Hamanako
A balcony with wicker chairs and a table, overlooking a body of water and greenery.
A traditional Japanese-style room with tatami flooring, a low table, a sofa, a television, and a refrigerator.
A room with a television, a desk with a kettle, a chair, and a window with curtains.
A tatami mat room with a futon, a table, chairs, a television, and a cabinet.

2. Tabist Kosai Hamanako no Yado

Tabist Kosai Hamanako no Yado
Kosai
$30
$33 total
Oct 20 - Oct 21
Tabist Kosai Hamanako no Yado
A traditional Japanese-style room with tatami flooring, a woven rattan ottoman, and a view of a cityscape through large windows.
A reception desk with a sign reading "LE SENSORIEL" and a potted plant in the foreground.
A dining area with wicker furniture and a table set for two, overlooking a body of water and mountains.
A hotel room with two beds, a TV, a desk, and a view of the water.

3. Grand Mercure Lake Hamana Resort & Spa

Grand Mercure Lake Hamana Resort & Spa
Nishi Ward
$49
$62 total
Oct 26 - Oct 27
Grand Mercure Lake Hamana Resort & Spa
A marina with several boats docked, a pier extending into the water, and a distant mountain range.
A traditional Japanese building with a tiled roof, wooden doors, and a gated entrance.
A long dining table with various dishes and a central pot, surrounded by tatami mats.
A sunset over a calm body of water with a dock and boats.

4. Minshuku Takahashi Kashibuneten

Minshuku Takahashi Kashibuneten
Nishi Ward
$63
$70 total
Oct 19 - Oct 20
Minshuku Takahashi Kashibuneten
A desk with a desk lamp, a telephone, and a power adapter.
A classroom with desks, chairs, a vending machine, and a refrigerator.
A laundry facility with three white washing machines, each with a digital control panel and a price tag of ¥300.
A parking sign with a directional arrow and a hotel name.

5. Toyoko Inn Hamamatsu-eki Minami-guchi

Toyoko Inn Hamamatsu-eki Minami-guchi
Naka Ward
$55
$60 total
Oct 12 - Oct 13
Toyoko Inn Hamamatsu-eki Minami-guchi
A spacious lobby with a reception desk, a seating area, and a decorative plant centerpiece.
A modern kitchen with chefs preparing food, stainless steel cooking stations, and a decorative wall with a leaf pattern.
A hotel hallway with doors on both sides, carpeted floor, and recessed lighting.
A hotel room with a bed, a desk with a computer, a TV, a chair, a sofa, and a view of the city at dusk.

6. Hotel Associa Toyohashi

Hotel Associa Toyohashi
Toyohashi
$64
$78 total
Nov 4 - Nov 5
Hotel Associa Toyohashi
The exterior of the Centurion Hotel with a clear view of the entrance, including the name and address.
A hotel room with two beds, a bedside table, a phone, and a wall-mounted picture.
A long, narrow hotel corridor with wooden doors on both sides and a carpeted floor.
A buffet with various dishes including seafood, salads, and noodles.

7. Centurion Hotel Hamamatsu

Centurion Hotel Hamamatsu
Naka Ward
$30
$34 total
Oct 12 - Oct 13
Centurion Hotel Hamamatsu
A spacious lobby with a central seating area, a bar, and a staircase.
A modern hotel room with a sofa, armchair, round table, large window, and a flat-screen TV.
A modern room with a sofa, a chair, a round table, and a large window with a city view.
A modern hotel room with a large bed, a desk, and a view of the city.

8. Hamamatsu Marriott Hotel

Hamamatsu Marriott Hotel
Naka Ward
$82
$99 total
Oct 12 - Oct 13
Hamamatsu Marriott Hotel
A hotel lobby with a reception desk, glass doors, and a staircase.
A modern hotel room with a large bed, a desk, a chair, and a small ottoman.
A modern gym with exercise equipment, a wall of dumbbells, and large windows.
Bar (on property)

9. Crowne Plaza - ANA Hamamatsu by IHG

Crowne Plaza - ANA Hamamatsu by IHG
Naka Ward
$51
$77 total
Oct 18 - Oct 19
Crowne Plaza - ANA Hamamatsu by IHG
A modern breakfast buffet with various food items and a chef preparing food.
A traditional Japanese-style room with tatami flooring, wooden furniture, and sliding doors. Tables are set with chopsticks and a vase of flowers.
Room
A spacious lobby with a central escalator, multiple seating areas, and digital information displays.

10. Hotel Concorde Hamamatsu

Hotel Concorde Hamamatsu
Naka Ward
$47
$57 total
Nov 3 - Nov 4
Hotel Concorde Hamamatsu
A hot spring area with a stone floor, wooden rocks, and a view of a wooden fence through a window.
A modern kitchen with wooden cabinetry, stainless steel appliances, and a buffet area with various food items.
A traditional Japanese interior with a wooden door, a wooden floor, and a sign with Japanese characters.
A modern lobby with a reception desk, a patterned wall, and an elevator.

11. Dormy Inn EXPRESS Toyohashi Hot Spring

Dormy Inn EXPRESS Toyohashi Hot Spring
Toyohashi
$63
$69 total
Nov 5 - Nov 6
Dormy Inn EXPRESS Toyohashi Hot Spring
A modern hotel room with a bed, a leather sofa, and a large window with curtains.
A modern workspace with two monitors, a keyboard, and a mouse on a desk.
A modern lounge area with leather sofas, a chandelier, and wall-mounted lighting fixtures.
A modern hotel reception area with a geometric patterned wall, a reception desk, and a staircase leading to the upper floor.

12. Hotel Leon Hamamatsu

Hotel Leon Hamamatsu
Naka Ward
$34
$37 total
Oct 12 - Oct 13
Hotel Leon Hamamatsu
Restaurant
A hotel room with two beds, a desk, a TV, and a small table.
A modern interior with a curved staircase, a carpeted floor, and a tiled wall.
A tall hotel building with a sign reading "Richmond Hotel" at the top.

13. Richmond Hotel Hamamatsu

Richmond Hotel Hamamatsu
Naka Ward
$57
$63 total
Oct 18 - Oct 19
Richmond Hotel Hamamatsu
A building with a large arched entrance and a glass door, illuminated by interior lighting.
A reception desk with a sign reading "INFORMATION FRONT" and a brick wall in the background.
A restaurant with a long counter, chairs, and a small table. There is a sink and a plant on the counter.
A hotel room with a TV, two beds, a desk with a lamp, and a window with curtains.

14. Hotel Select Inn Hamamatsu Ekimae

Hotel Select Inn Hamamatsu Ekimae
Naka Ward
$36
$43 total
Oct 12 - Oct 13
Hotel Select Inn Hamamatsu Ekimae
Two self-service kiosks with screens, a neon sign, and a small shelf with brochures.
A pair of elevator doors with digital displays above them, set in a modern building interior.
A hotel room with a bed, a desk, a chair, a small table, and a window with curtains.
A laundry facility with multiple washing machines and dryers, arranged in a row with control panels on top.

15. Toyoko Inn Toyohashi Ekimae Odori

Toyoko Inn Toyohashi Ekimae Odori
Toyohashi
$60
$66 total
Nov 6 - Nov 7
Toyoko Inn Toyohashi Ekimae Odori
A buffet with various food items and beverages, a counter with a cash register, and a seating area with a view of the cityscape.
A multi-story hotel with a modern facade, a visible entrance, and a parking structure adjacent to it.
Restaurant
A reception area with a modern design, featuring a reception desk, a large decorative plant, and a stone wall.

16. HOTEL SUI HAMAMATSU

HOTEL SUI HAMAMATSU
Naka Ward
$49
$54 total
Nov 6 - Nov 7
HOTEL SUI HAMAMATSU
A library cafe with wooden tables and chairs, bookshelves, and a coffee bar.
A laundry facility with multiple washing machines and dryers, including a CO/N washer and a 45kg dryer.
A modern library with wooden tables and chairs, bookshelves, and hanging light fixtures.
A modern library with wooden tables and chairs, bookshelves, and a large window with blinds.

17. Comfort Hotel Hamamatsu

Comfort Hotel Hamamatsu
Naka Ward
$43
$47 total
Oct 18 - Oct 19
Comfort Hotel Hamamatsu
A Daiwa Roynet Hotel with a modern design, featuring a grid of windows and a prominent hotel logo on the facade.
A hotel room with two beds, a desk, a chair, a small table, and a window with curtains.
Exterior
A modern reception area with a dark tiled wall and a glass counter.

18. Daiwa Roynet Hotel Hamamatsu

Daiwa Roynet Hotel Hamamatsu
Naka Ward
$57
$68 total
Nov 6 - Nov 7
Daiwa Roynet Hotel Hamamatsu
A high-rise room with a city view, large windows, a sofa, and a table with a lamp.
A restaurant with tables set for dining, a chandelier, and a city view through large windows.
A modern hotel room with a large city view, a flat-screen TV, a desk, and a comfortable bed with multiple pillows.
A high-rise room with a city view, featuring a sofa, armchairs, and a coffee table.

19. Hotel Arc Riche Toyohashi

Hotel Arc Riche Toyohashi
Toyohashi
$88
$97 total
Oct 12 - Oct 13
Hotel Arc Riche Toyohashi
A buffet setup with various food items and serving utensils, a wooden counter, and a metallic backdrop.
A reception area with a black reception desk, a self-service kiosk, and a painting on the wall.
A tall building with a sign reading "HAMAMATSU HOTEL" at the bottom.
A wide, open sandy beach with gentle waves in the background.

20. Hamamatsu Hotel

Hamamatsu Hotel
Naka Ward
$42
$51 total
Oct 18 - Oct 19
Hamamatsu Hotel
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Go beyond your typical stay in Kosai

pet friendly image
Pet friendly
Pet friendly
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Hot tub
Hot tub
Pool image
Pool
Pool
spa image
Spa
Spa
Family friendly image
Family friendly
Family friendly
Apartment image
Apart­ment
Apart­ment
ryokan image
Ryokan
Ryokan
Our prices for hotels in Kosai are cheapest in June

Price trends for hotels in Kosai

Pricing is based on two traveler single night rates
View properties in October

October

High 22°C / low 16°C. Partly sunny.
22°
16°
17°
11°
11°
5°
9°
3°
10°
3°
14°
6°
18°
10°
22°
15°
25°
19°
28°
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Monthly weather averages (˚C)

Top landmarks in Kosai

Arai Beach

7.0/10 (2 reviews)
Whether you want to hunt for sand dollars or smell the fresh air, Arai Beach is a spot you might want to check out, located 4.7 mi (7.6 km) from central Kosai. Catch the sunset by the shore at Arai Benten Beach, just a short walk away.
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Sakichi Toyoda Memorial House

6.0/10 (2 reviews)
Sakichi Toyoda Memorial House is just one of the landmarks located 5.9 mi (9.5 km) from central Kosai, so you might want to stop by for a few pics during your trip.
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Arai Benten Beach

7.0/10 (2 reviews)
Whether you want to hunt for sand dollars or smell the fresh air, Arai Benten Beach is a spot you might want to check out, located 5.1 mi (8.2 km) from central Kosai. Catch the sunset by the shore at Arai Beach, just a short walk away.
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Myoryuji Temple

Myoryuji Temple is 6.5 mi (10.4 km) from central Kosai, why not stop by during your stay.
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Ogaji Temple

6.0/10 (2 reviews)
Ogaji Temple is 5.3 mi (8.6 km) from central Kosai, why not stop by during your stay.
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Honkoji Temple

Honkoji Temple is 6.5 mi (10.4 km) from central Kosai, why not stop by during your stay.
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Road Station Shiomisaka

Road Station Shiomisaka is worth a visit, located 4.1 mi (6.6 km) from central Kosai.
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Learn more about Kosai

Kosai is well-known for its attractions such as Lake Hamana and Arai Beach.

See all hotels in Kosai
A stone lantern, a pine tree, and a coastal view.

Check out reviews of Kosai hotels guests love

A marina with several boats docked, a pier extending into the water, and a distant mountain range.
A traditional Japanese building with a tiled roof, wooden doors, and a gated entrance.
A long dining table with various dishes and a central pot, surrounded by tatami mats.
A sunset over a calm body of water with a dock and boats.

Minshuku Takahashi Kashibuneten

Minshuku Takahashi Kashibuneten
Nishi Ward

10/10 Exceptional

United States
Yoong
Minshuku Takahashi Kashibuneten
A spacious lobby with a reception desk, a seating area, and a decorative plant centerpiece.
A modern kitchen with chefs preparing food, stainless steel cooking stations, and a decorative wall with a leaf pattern.
A hotel hallway with doors on both sides, carpeted floor, and recessed lighting.
A hotel room with a bed, a desk with a computer, a TV, a chair, a sofa, and a view of the city at dusk.

Hotel Associa Toyohashi

Hotel Associa Toyohashi
Toyohashi

10/10 Exceptional

United States
Denise
Hotel Associa Toyohashi
A balcony with wicker chairs and a table, overlooking a body of water and greenery.
A traditional Japanese-style room with tatami flooring, a low table, a sofa, a television, and a refrigerator.
A room with a television, a desk with a kettle, a chair, and a window with curtains.
A tatami mat room with a futon, a table, chairs, a television, and a cabinet.

Tabist Kosai Hamanako no Yado

Tabist Kosai Hamanako no Yado
Kosai

10/10 Exceptional

United States
Sigrid
Tabist Kosai Hamanako no Yado
A desk with a desk lamp, a telephone, and a power adapter.
A classroom with desks, chairs, a vending machine, and a refrigerator.
A laundry facility with three white washing machines, each with a digital control panel and a price tag of ¥300.
A parking sign with a directional arrow and a hotel name.

Toyoko Inn Hamamatsu-eki Minami-guchi

Toyoko Inn Hamamatsu-eki Minami-guchi
Naka Ward

8/10 Very good

United States
Kenichi
Toyoko Inn Hamamatsu-eki Minami-guchi
A hot spring area with a stone floor, wooden rocks, and a view of a wooden fence through a window.
A modern kitchen with wooden cabinetry, stainless steel appliances, and a buffet area with various food items.
A traditional Japanese interior with a wooden door, a wooden floor, and a sign with Japanese characters.
A modern lobby with a reception desk, a patterned wall, and an elevator.

Dormy Inn EXPRESS Toyohashi Hot Spring

Dormy Inn EXPRESS Toyohashi Hot Spring
Toyohashi

10/10 Exceptional

United States
Christopher
Dormy Inn EXPRESS Toyohashi Hot Spring
A spacious indoor area with a wooden table and chairs, surrounded by potted plants and large windows allowing natural light.
A modern bathroom with a large mirror, a black marble countertop, and a view of a garden with tall grasses and trees.
A modern building with large glass windows and a reflective pool.
A modern interior with glass walls, wooden beams, and a view of greenery.

GREENITY IWATA

GREENITY IWATA
Iwata

10/10 Exceptional

United States
Mark
GREENITY IWATA
A modern train station with two sleek bullet trains on adjacent tracks, a pedestrian bridge overhead, and a tall building in the background.
A modern kitchen with a large island, bar stools, and a city view through large windows.
A spacious lobby with high ceilings, large golden columns, and a polished marble floor.
A spacious indoor venue with a curved seating arrangement, white columns, and large windows allowing natural light.

Okura Act City Hotel Hamamatsu

Okura Act City Hotel Hamamatsu
Naka Ward

10/10 Exceptional

United States
Ernesto
Okura Act City Hotel Hamamatsu
A hotel room with two beds, a desk, a chair, and a window with curtains.
A reception area with a marble counter, two computers, a clock, and a first aid kit.
A multi-story Comfort Hotel building with a modern facade, numerous windows, and a prominent signage.
A row of white, modern, front-loading washing machines in a commercial setting.

Comfort Hotel Toyohashi

Comfort Hotel Toyohashi
Toyohashi

10/10 Exceptional

United States
Joshua
Comfort Hotel Toyohashi

Frequently Asked Questions

What accommodations do travelers recommend in Kosai?

Guests like Hotel Route Inn Hamanako, Tabist Kosai Hamanako no Yado and Grand Mercure Lake Hamana Resort & Spa.

Can I book refundable hotels in Kosai?

If you need the flexibility to change your travel plans to Kosai, most properties offer refundable* rates you can book. You can see these accommodations by searching our site and using the "fully refundable" filter to narrow down the results.

What will the weather in Kosai be like during my visit?

August and July are typically the warmest months in Kosai when the average temp is 76°F. January and February are the coldest months when the average temperature is 46°F. July and June are the months with the most rain.

Why should I book my Kosai accommodation with Hotels.com?

There are lots of reasons to book your Kosai trip with us: our free cancellations on selected hotels* gives you flexibility, and with One Key™, our rewards program, you will be able to earn and use OneKeyCash™** on all eligible bookings such as hotels, car rentals, flights, vacation rentals and more on Hotels.com, Expedia and Vrbo.