Hotels in Kosai

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Top 5 hotels in Kosai at a glance

Hotel Route Inn Hamanako — 3-star hotel in Kosai. Guest rating: 8.0/10 — Very Good.
Tabist Kosai Hamanako no Yado — 2-star hotel in Kosai. Guest rating: 7.0/10 — Good.
Grand Mercure Lake Hamana Resort & Spa — 4-star hotel in Nishi Ward. Guest rating: 8.0/10 — Very Good.
Hotel Associa Toyohashi — 4-star hotel in Toyohashi. Guest rating: 9.0/10 — Wonderful.
Minshuku Takahashi Kashibuneten — 2.5-star hotel in Nishi Ward. Guest rating: 9.6/10 — Exceptional.

Where to stay in Kosai?

Properties are selected based on real traveler reviews and popularity among guests who’ve booked a night in Kosai on Hotels.com. These Kosai hotels consistently deliver on comfort, location and traveler experience. Last updated on August 15, 2026.

Hotel Route Inn Hamanako

Kosai

CNY489

CNY538 total

Aug 26 - Aug 27

Japanese Room- Single Occupancy with Shared Washroom (Non Smoking) No co-sleeping allowed | WiFi (free), bed sheets

Japanese Room with Shared Washroom - Family (Non-Smoking) | WiFi (free), bed sheets

Tabist Kosai Hamanako no Yado

Kosai

CNY199

CNY219 total

Sep 1 - Sep 2

Classic Suite, Multiple Beds (Japanese Western Style) | In-room safe, iron/ironing board (on request), WiFi (free), bed sheets

In-room safe, iron/ironing board (on request), WiFi (free), bed sheets

Classic Suite, 2 Twin Beds | In-room safe, iron/ironing board (on request), WiFi (free), bed sheets

Family Room, Multiple Beds | In-room safe, iron/ironing board (on request), WiFi (free), bed sheets

Grand Mercure Lake Hamana Resort & Spa

Nishi Ward

CNY346

CNY432 total

Aug 31 - Sep 1

Superior Twin Room [Non Smoking] | Minibar, desk, laptop workspace, soundproofing

Hotel Associa Toyohashi

Toyohashi

CNY372

CNY450 total

Aug 27 - Aug 28

Minshuku Takahashi Kashibuneten

Nishi Ward

CNY400

CNY440 total

Aug 17 - Aug 18

3 restaurants; breakfast, lunch, and dinner served

Premium bedding, down comforters, in-room safe, desk

Loisir Hotel Toyohashi

Toyohashi

CNY492

CNY595 total

Aug 18 - Aug 19

Kuretake Inn Hamamatsu Nishi Inter

Naka Ward

CNY471

CNY570 total

Aug 21 - Aug 22

Desk, blackout drapes, WiFi (free), bed sheets

APA Hotel Toyohashi Ekimae

Toyohashi

CNY434

CNY525 total

Aug 23 - Aug 24

Dormy Inn EXPRESS Toyohashi Hot Spring

Toyohashi

CNY404

CNY444 total

Aug 30 - Aug 31

Hotel Route Inn Hamamatsunishi Inter

Nishi Ward

CNY493

CNY542 total

Aug 30 - Aug 31

Laptop workspace, blackout drapes, iron/ironing board (on request)

Toyoko Inn Hamamatsu-eki Minami-guchi

Naka Ward

CNY367

CNY404 total

Aug 17 - Aug 18

Hypo-allergenic bedding available, down comforters, memory foam beds

Hamamatsu Marriott Hotel

Naka Ward

CNY550

CNY666 total

Aug 17 - Aug 18

Okura Act City Hotel Hamamatsu

Naka Ward

CNY700

CNY847 total

Sep 1 - Sep 2

2 restaurants; breakfast, lunch, and dinner served

Premium bedding, down comforters, pillowtop beds, minibar

Hotel Arc Riche Toyohashi

Toyohashi

CNY386

CNY425 total

Aug 23 - Aug 24

Japanese Modern Style Room, Non Smoking | Laptop workspace, WiFi (free), bed sheets

Hotel Listel Hamanako

Kita Ward

CNY862

CNY961 total

Aug 30 - Aug 31

Japanese-style Room with Lake View FB4 | In-room safe, desk, WiFi (free)

Hoshino Resorts KAI Enshu

Nishi Ward

CNY3,175

CNY3,505 total

Aug 31 - Sep 1

Comfort Hotel Toyokawa

Toyokawa

CNY300

CNY330 total

Aug 23 - Aug 24

Comfort Hotel Toyohashi

Toyohashi

CNY346

CNY381 total

Aug 30 - Aug 31

Combined shower/tub, free toiletries, hair dryer, slippers

Casual Twin for 2 Guests, Non smoking | Down comforters, blackout drapes, iron/ironing board (on request)

Daiwa Roynet Hotel Hamamatsu

Naka Ward

CNY311

CNY377 total

Sep 6 - Sep 7

Hotel Route Inn Toyohashi Ekimae

Toyohashi

CNY445

CNY489 total

Aug 31 - Sep 1

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Go beyond your typical stay in Kosai

Spa

Ryokan

Pool

Family friendly

Our prices for hotels in Kosai are cheapest in February

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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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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Road Station Shiomisaka

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

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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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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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Learn more about Kosai

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

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A coastal city with a marina, buildings, and a forested hill.

Check out reviews of Kosai hotels guests love

Okura Act City Hotel Hamamatsu

8/10 Good

"I really liked my room. It was spacious and clean. The staff were very helpful. The only negative is that I think the property could be updated a little bit. My stay was great. I'll definitely stay again when in the Hamamatsu area."