Kosai

Travel Guide

A stone lantern, a pine tree, and a coastal view.
Two pine trees by a calm sea with boats in the distance.
A traditional Japanese torii gate surrounded by a forest of pine trees.
A traditional Japanese gate with a tiled roof and a sign with Japanese characters.
A traditional Japanese temple surrounded by cherry blossoms.
Hotel Route Inn Hamanako

Hotel Route Inn Hamanako

3 out of 5
1049-1, Komi Kosai Shizuoka-ken
$71 nightly
The price is $78 total per night from Dec 7 to Dec 8
$78 total
Dec 7 - Dec 8
Stay at this hotel in Kosai. Enjoy free WiFi, free parking, and a 24-hour front desk. Popular attractions Lake Hamana and Sakichi Toyoda Memorial House are located ...
Hotel Route Inn Hamanako
Tabist Kosai Hamanako no Yado

Tabist Kosai Hamanako no Yado

2 out of 5
1253-1 Ochiba Kosai Shizuoka
$28 nightly
The price is $31 total per night from Nov 8 to Nov 9
$31 total
Nov 8 - Nov 9
Stay at this guesthouse in Kosai. Enjoy free WiFi, free parking, and daily housekeeping. Popular attractions Lake Hamana and Sakichi Toyoda Memorial House are ...
7/10 Good! (52 reviews)
Good overall
"It's was really good, I forgot to ask for an early check-in but theh saw me sitting outside waiting let me check in early which was super nice, I did nock to ask if I could leave my bags but the only staff there at the time was deaf, so that's okay. The room was good and comfy and warm. And the bath ..."

Reviewed on Feb 10, 2025

Tabist Kosai Hamanako no Yado
Hotel Associa Toyohashi

Hotel Associa Toyohashi

4 out of 5
Nishijuku-cho, Hanada-cho Toyohashi Aichi-ken
$65 nightly
The price is $71 total per night from Nov 23 to Nov 24
$71 total
Nov 23 - Nov 24
Stay at this hotel in Toyohashi. Enjoy free WiFi, 3 restaurants, and breakfast (surcharge). Our guests praise the property condition in our reviews. Popular ...
9/10 Wonderful! (1,003 reviews)
"Good room&Good meal, perfect hotel"

Reviewed on Nov 3, 2026

Hotel Associa Toyohashi
See all 127 properties in Kosai
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.
Le Grand Mishima

Le Grand Mishima

3 out of 5
1398-1 Hamamatsu Shizuoka
Stay at this apartment in Hamamatsu. Enjoy free WiFi. Popular attractions Hamamatsu Science Museum and Enshunada Coastal Park are located nearby.
Le Grand Mishima
WOOD DESIGN PARK - Campground

WOOD DESIGN PARK - Campground

2 out of 5
8-4, Himen, Kajinocho Okazaki Aichi
Stay at this campground in Okazaki. Enjoy free WiFi, free parking, and a garden. Popular attractions Okazaki City Art Museum and Okazaki Chuo Sogo Park are located ...
8/10 Very Good! (1 review)
"バスルームに少し赤カビがあったのと、子供の食事が、バーベキューの肉🍖が硬く、そんなに食べれなかったです。 それ以外は良かったです。"

Reviewed on Mar 30, 2020

WOOD DESIGN PARK - Campground

tom's test TEST property for Japan

2 out of 5
Hikuma Naka Ward Hamamatsu Shizuoka
Stay at this apartment in Hamamatsu. Popular attractions Yamaha Innovation Road Museum and Hamamatsu Castle are located nearby.
tom's test TEST property for Japan
See all properties in Kosai
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.

Stay near popular Kosai attractions

Arai Beach

7.0/10 (2 reviews)
Why not spend a carefree afternoon at Arai Beach during your travels in Kosai?
See properties

Frequently asked questions

Is Kosai worth visiting?
Kosai is worth visiting for its beautiful coastal experiences. Travelers can enjoy the scenic Arai Beach and the tranquil Arai Benten Beach, which provide excellent opportunities for relaxing by the water and taking in the natural beauty of the shoreline.
When is the best time to visit Kosai?
The best time to visit Kosai is from April through July. Travelers also get great value and fewer crowds during the quieter months of December through March, when the weather is cooler and pleasant for exploring the area.
What is Kosai known for?
Kosai is known for its scenic coastal areas, including Arai Beach and Arai Benten Beach, offering travelers relaxing seaside experiences. This city in Japan also features the historic Myoryuji Temple, providing a glimpse into local culture.
What is a good itinerary length for Kosai?
A good itinerary length for Kosai is one to two days to explore highlights like Arai Beach, Arai Benten Beach, and Myoryuji Temple. An extended stay of three to four days allows travelers to enjoy the beaches and other areas of interest at a more relaxed pace, fully experiencing the natural beauty.
What are the top things to do in and around Kosai?
Kosai offers travelers a mix of serene beaches and historic cultural sites to explore:


How do I plan a trip to Kosai?
When planning your Kosai trip, book flights and accommodations on Expedia. A rental car helps you explore attractions like Arai Beach, Arai Benten Beach, and Myoryuji Temple. For outdoor activities, plan for early morning or late afternoon to make the most of your visit.
Can I book a refundable hotel in Kosai?
Yes, Expedia offers many flexible booking options, and you can look for refundable hotels in Kosai by entering your dates and using the refundable or fully refundable filter. Always check the hotel's cancellation policy before you book, since terms can vary by hotel, and visit Expedia help center for further details.
Why book a trip to Kosai with Expedia?
Expedia makes it easier to plan your Kosai trip with travel tools, flexible search options, and bookable trip components all in one place. You can organize your plans in one account and use Expedia to help build a trip that fits your budget and travel style. Find out more about how by visiting Expedia's Trip Planner page.
Should I stay in a hotel or vacation rental in Kosai?
The best choice depends on your travel style. Hotels in Kosai can be a good fit for convenience, on-site amenities, and shorter stays, while vacation rentals may offer more space, privacy, and home-style amenities for longer trips, families, or groups. With Expedia, you can compare both options side by side, read traveler reviews, and filter by amenities to find the right fit for your trip.
How can I manage my Kosai trip on Expedia?
Once you've booked your Kosai trip, you can manage it through your Expedia account or the Expedia app. You can view your itinerary, access booking details, make eligible changes, and check for updates in My Trips. The Expedia app can also help you stay organized while you travel.
What if I need help during my Kosai trip?
Expedia offers customer support before, during, and after your Kosai trip. If your plans change or something unexpected happens, you can review your booking in My Trips and use Expedia help center channels for help with eligible changes, cancellations, or travel issues.
How can Expedia help me plan my first trip to Kosai?
If it's your first trip to Kosai, Expedia can help you plan by bringing together stays, flights, activities, traveler reviews, and trip-planning tools in one place. With Expedia's Trip Planner you can compare options, read reviews from other travelers, and build an itinerary that matches your interests and budget.
How can I save on my Kosai hotel booking with Expedia?
Join One Key™ for free to unlock instant discounts with Member Prices on select hotels. You can also earn and use OneKeyCash™* on eligible bookings on Expedia. Booking in advance is usually another great way to save on your Kosai hotel.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

Cities near Kosai

A woman and child walking on a bridge over a body of water, with cherry blossoms in the background.

Hamamatsu

A traditional Japanese castle surrounded by lush greenery and a stone wall.

Toyohashi

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