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9 Dec - 10 Dec
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10 Dec - 11 Dec
This weekend
12 Dec - 14 Dec
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19 Dec - 21 Dec

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Top hotels and accommodation in Kosai

Terrace/patio
Tabist Kosai Hamanako no Yado

Tabist Kosai Hamanako no Yado

2.0 star property
Kosai
7.0 out of 10, Good, (45)
"Wonderful hotel. Very quiet. Our room was huge!"
United States
Sigrid
The price is NZ$52
21 Dec - 22 Dec
Tabist Kosai Hamanako no Yado
Public bath
Hotel Route Inn Hamanako

Hotel Route Inn Hamanako

3.0 star property
Kosai
8.0 out of 10, Very good, (185)
"very good"
Japan
たく
The price is NZ$122
17 Dec - 18 Dec
Hotel Route Inn Hamanako
Exterior
Loisir Hotel Toyohashi

Loisir Hotel Toyohashi

3.5 star property
Toyohashi
8.6 out of 10, Excellent, (621)
"Staff was great, the room was spacey and nicely furniture, including a sofa and a desk. You can tell the hotel is not new at all, but the bathroom was very modern and super clean, water pressure was very strong. All in all a great stay. Would definitely recommend or stay again if the opportunity arises."
United States
Alain
Loisir Hotel Toyohashi
Hot springs
Dormy Inn EXPRESS Toyohashi Hot Spring

Dormy Inn EXPRESS Toyohashi Hot Spring

3.0 star property
Toyohashi
9.0 out of 10, Wonderful, (149)
"so nice!! this hotel had top-notch facilities and outstanding hospitality!!"
Japan
SHUNSNKE
The price is NZ$109
8 Jan - 9 Jan 2026
Dormy Inn EXPRESS Toyohashi Hot Spring
Front of property
Richmond Hotel Hamamatsu

Richmond Hotel Hamamatsu

3.0 star property
Naka Ward
8.8 out of 10, Excellent, (603)
"Rightly recommended! "
United States
Priscilla Aparecida
Richmond Hotel Hamamatsu
Daily buffet breakfast (JPY 500 per person)
Okadaya Bayside

Okadaya Bayside

3.0 star property
Toyohashi
7.4 out of 10, Good, (45)
"good"
Japan
??
The price is NZ$86
14 Dec - 15 Dec
Okadaya Bayside
Free toiletries, hair dryer, slippers, electronic bidet
Tennomaru

Tennomaru

4.0 star property
Kota
8.8 out of 10, Excellent, (18)
"朝食付きのプラン 1人づつのお膳でした。出来立ての卵焼きや魚の揚げ物が着席後に提供されました。大変美味しかったです。"
Japan
MASAYUKI
The price is NZ$261
18 Dec - 19 Dec
Tennomaru
Exterior
Okura Act City Hotel Hamamatsu

Okura Act City Hotel Hamamatsu

4.5 star property
Naka Ward
9.0 out of 10, Wonderful, (1003)
"great breakfast."
United States
Owen
The price is NZ$217
7 Jan - 8 Jan 2026
Okura Act City Hotel Hamamatsu
Seasonal outdoor pool
Grand Mercure Lake Hamana Resort & Spa

Grand Mercure Lake Hamana Resort & Spa

4.0 star property
Nishi Ward
8.0 out of 10, Very good, (600)
"Great location!"
United States
Bilal
The price is NZ$127
8 Jan - 9 Jan 2026
Grand Mercure Lake Hamana Resort & Spa
Public bath
Gamagori Hotel

Gamagori Hotel

3.0 star property
Gamagori
6.8 out of 10, (121)
"Quiet comfortable"
United States
Mario
The price is NZ$105
18 Dec - 19 Dec
Gamagori Hotel
Exterior
Hotel Associa Toyohashi

Hotel Associa Toyohashi

4.0 star property
Toyohashi
9.0 out of 10, Wonderful, (996)
"Staff were very kind !"
Canada
Yosuke
The price is NZ$117
26 Dec - 27 Dec
Hotel Associa Toyohashi
Property amenity
Comfort Hotel Hamamatsu

Comfort Hotel Hamamatsu

3.0 star property
Naka Ward
8.6 out of 10, Excellent, (431)
"Perfect stay for both business and personal."
United States
YASUHIDE
The price is NZ$78
14 Dec - 15 Dec
Comfort Hotel Hamamatsu
Reception
Hotel Route Inn Shinshiro

Hotel Route Inn Shinshiro

3.0 star property
Shinshiro
9.2 out of 10, Wonderful, (467)
"Nice spa, with free breakfast and a coffee area lounge. "
United States
Dwight
The price is NZ$146
12 Dec - 13 Dec
Hotel Route Inn Shinshiro
Property amenity
Hotel Crown Hills Toyokawa

Hotel Crown Hills Toyokawa

3.0 star property
Toyokawa
7.0 out of 10, Good, (156)
"禁煙室のはずなのに強烈なタバコ臭さ、消臭スプレーも無意味でした。また、夜中中隣人のシャワーの音でも無いトイレの音でも無い、ポコポコ、グリュグリュとか奇妙な音が、かなりの音量で浴室とベッドの間から聞こえて来て一睡も出来ず。 ただ、スタッフの方、お掃除の方、食事の担当の方の 対応が良かったので苦情も言わずにチックアウトしました。 "
Japan
Michiyo
The price is NZ$119
21 Dec - 22 Dec
Hotel Crown Hills Toyokawa
Daily buffet breakfast (JPY 1100 per person)
Hotel Ascent Hamamatsu

Hotel Ascent Hamamatsu

3.0 star property
Naka Ward
7.6 out of 10, Good, (154)
"チェックインもスムーズで、質問にも答えてくださって良かったです"
Japan
FUYUKA
Hotel Ascent Hamamatsu
Lobby
Comfort Hotel Toyokawa

Comfort Hotel Toyokawa

3.0 star property
Toyokawa
8.6 out of 10, Excellent, (120)
"It little bit difficult to find the hotel from train station. Well price and service"
United States
Rika
The price is NZ$96
25 Dec - 26 Dec
Comfort Hotel Toyokawa
Front of property
HOTEL SUI HAMAMATSU

HOTEL SUI HAMAMATSU

3.5 star property
Naka Ward
9.2 out of 10, Wonderful, (261)
"breakfast was curated of local food, absolutely loved it. "
United States
Tian
HOTEL SUI HAMAMATSU
Spa
Tenku Kaiyu no Yado Suehiro

Tenku Kaiyu no Yado Suehiro

3.5 star property
Nishiuracho
7.8 out of 10, Good, (53)
"Great dinner and breakfast. Enomous amount of food, including steak, lobster, fish, pork, rice, soup, dessert. Roof top onsen has a great view. The hotel is also walk distance to a famous sunset viewing spot. The room is a little bit old but clean and nice."
Saudi Arabia
Tyler Francis
Tenku Kaiyu no Yado Suehiro
Reception
Daiwa Roynet Hotel Hamamatsu

Daiwa Roynet Hotel Hamamatsu

3.0 star property
Naka Ward
8.8 out of 10, Excellent, (937)
"Very comfortable hotel in a convenient location."
Italy
Dario
The price is NZ$124
14 Dec - 15 Dec
Daiwa Roynet Hotel Hamamatsu
Luxury King, Non Smoking | City view
Hotel Arc Riche Toyohashi

Hotel Arc Riche Toyohashi

3.5 star property
Toyohashi
9.4 out of 10, Exceptional, (199)
"Very well presented hotel, easy walk to train station. Very nice lounge area. "
United Kingdom
David
The price is NZ$141
21 Dec - 22 Dec
Hotel Arc Riche Toyohashi
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.
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Stay near popular Kosai attractions

Arai Beach

Why not spend a care-free afternoon at Arai Beach during your travels in Kosai?
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Sakichi Toyoda Memorial House

You can learn about the history of Kosai with a visit to Sakichi Toyoda Memorial House. Stroll along the lakeside or discover the area's desert landscape.
See properties

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

Top Kosai Hotel Reviews

Hotel Route Inn Hamanako

Hotel Route Inn Hamanako

8/10 Good
"Nothing any defect, but just all facilities could be aged. If possible, and if I can suggest to you that it might be better some update."
Futoshi 1-night trip
Posted 3 weeks ago
Hotel Route Inn Hamanako

More cheap accommodation in Kosai

HOTEL LiVEMAX Hamamatsu-Ekimae

HOTEL LiVEMAX Hamamatsu-Ekimae

Kajimachi Plaza 6F Hamamatsu
The price is NZ$65 per night from 6 Jan to 7 Jan
NZ$65
6 Jan - 7 Jan 2026
7/10 Good! (293 reviews)

Frequently asked questions

What's the best place for a stay in Kosai?
Based on our traveller data, Hotel Route Inn Hamanako is one of the top choices for your stay. This hotel is a short 7-minute walk from Lake Hamana, and it offers a restaurant and free parking. Tabist Kosai Hamanako no Yado is another good option for your stay. See all available top hotels, or vacation rentals in Kosai.
What are some of the best holiday rentals that Kosai has to offer?
Shell Beach Hamana Lake Relax with the sound of - Osaki Villa / Hamamatsu Shizuoka: This holiday home rental outside of Kosai offers a garden, a BBQ and air conditioning to help you feel perfectly comfortable in your new surroundings. Kitchen amenities include a fridge, a stovetop and a microwave. See all vacation rentals in Kosai.
If I need to cancel my hotel reservation in Kosai, will I receive a refund?
Yes! The majority of hotel room reservations are fully refundable provided that you cancel prior to the hotel's cancellation deadline, which is often 24 or 48 hours before your arrival date. If you booked a non-refundable reservation, you may still be able to cancel and be given a refund within 24 hours of booking. Filter your search by fully refundable to find flexible hotel deals in Kosai.
What are some accommodation options with pools in Kosai?
Grand Mercure Lake Hamana Resort & Spa: Hotel, 1-minute walk from Lake Hamana. Offers a children's pool, a seasonal outdoor pool and spa services. View all hotels with pools in Kosai.
What's it like staying in Kosai?
Visitors can enjoy all that Kosai has to offer, including its beaches. In Kosai, there are 7 hotels and other accommodation options to choose from. Find out more about Kosai.
What should I see while I'm in Kosai?
Natural beauty is on display at Arai Beach, Lake Hamana and Arai Benten Beach. Additionally, you might want to add Sakichi Toyoda Memorial House to your itinerary. Take a look at what more there is to see and do in Expedia's Kosai guide.
What's the seasonal weather like in Kosai?
The hottest months are usually August and July, with an average temperature of 25°C, while the coldest months are January and February, with an average of 8°C. The rainiest months in Kosai are July, June, September and October, with each month seeing an average of 293 mm of rainfall.

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