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Ryokan

Ashiyasu Onsen Iwazonokan

Minami-Alps City, Yamanashi, Japan
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Our open-air boulder bath is the best in the prefecture! An inn with three grand baths and free-flowing water. Enjoy homelike hospitality, seasonal wild plants, and river fish.

Guest review score

Very Good
Reviews: 13
4.1

Access

Shiozaki Station
31 min drive
Nirasaki Station
32 min drive
Ryuo Station
33 min drive

Property facilities

  • Pick-up and drop-off
  • Home delivery
  • Vending machine
  • Shop
  • Meeting room
  • Banquet hall

Explore our rooms and plans

Price (low to high)
2 room types
*Room (Main building) 3
No smoking
Futon
13.0 m²
1–2 guests
Room facilities
  • Toilet available, no bath
  • TV
  • Electronic kettle
  • Toothbrush sets
  • Bath towels
  • Face towels
  • *[Men's open-air bath] All baths are 100% source water, with no heating or water circulation, making this a luxurious hot spring!
    Only 3 rooms left!
    Free cancellation until 18 Sep
    Meal
    Breakfast
    Dinner
    Flash Coupon
    Price for:
    1 night
     | 
     | 
    AU$317.24
    Taxes & fees incl.

    Coupon

    *The discount is calculated based on the original price.
    Plan details

    [Support for Mountaineers! Breakfast Onigiri and Special Benefit Plan]Relax in the hot spring before and after hiking[Includes 2 m [Breakfast] [Dinner]

    Free cancellation until 18/09/2026 11:59 p.m.(JST)

    Coupon

    *The discount is calculated based on the original price.

    [After hiking Mount Kitadake, get off at Hirogawara → Ashiyasu Onsen Bus Stop, which is right in front of our facility. Please be careful not to get off at the Ashiyasu Bus Stop before it.] \Supporting all hikers! Exciting plan with special benefits/ Half-price bathing after check-out (1,000 yen → 500 yen, tax included) Breakfast Onigiri provided for early morning departures Instead of breakfast, we will prepare an "Onigiri bento box." Regular breakfast is not included. If desired, please apply for a different plan. ==Bus operation period to the trailhead== Southern Alps Hiking Bus "Kofu, Ryuo, Ashiyasu Parking Lot ~ Hirogawara Line" 2026 ⇒ June 26 (Friday) ~ November 3 (Tuesday, holiday) Hirogawara ~ Kitazawa Pass Route Suspended =============== [Recommended routes in the area] Yashajin Pass Hiking Course Reach the trailhead in about 30 minutes from the inn and the summit observation deck in about 1 hour! You can enjoy the majestic view of the Shirane Sanzan in the Southern Alps (Kitadake, Ainodake, Notoridake)! Mount Kitadake, Mount Ainodake, and Mount Houousan Enjoy a refreshing ridge walk along a chain of 3,000-meter-class mountains! Advance reservations are required for mountain huts and tent sites. Please contact the Southern Alps Gateway (080-6775-7012 / 10:00–17:00). Please contact us in advance. Meals: Served at the dining area <Dinner> Offering Japanese banquet cuisine prepared with seasonal ingredients, primarily sourced locally and domestically. We offer healthy wild boar pork dishes that are low in calories and high in protein. * Menu content may change depending on the season and availability of ingredients. <Breakfast> We offer rice ball bento boxes, perfect for early morning departures. Hot Spring Ashiyasu Hot Spring offers 100% natural free-flowing hot spring water! A pure sulfate hot spring with no added water, The slightly soft and smooth hot spring water is known for its potential benefits in improving skin and relieving fatigue. This highly satisfying hot spring water is expected to have various effects (safe for drinking). - Large rock open-air bath ・Scenic large bath - Small family bath (Note: Please inquire in advance; this is not a private bath) [Spring quality] Sulfate hot spring (alkaline, hypotonic, high-temperature spring) containing sodium and calcium. [Effects] Improves skin health, relieves fatigue, eases muscle pain, joint pain, frozen shoulder, cold sensitivity, and promotes overall health. [Drinking effects] Beneficial for obesity, diabetes, chronic constipation, and gout. Other ・Free Wi-Fi available in the lobby We offer Ashiyasu Onsen, a secluded hot spring, as a mild-tasting drinkable hot spring water. *Please bring your own container for takeout.

    Flash Coupon
    AU$317.24
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Breakfast
    • Dinner
    Cancellation policy
    Free cancellation deadline
    18/09/2026 11:59 p.m. (JST)
    3 day(s) before your stay (from 00:00) (JST)
    30%
    1 day(s) before your stay (from 00:00) (JST)
    50%
    0 day(s) before your stay (from 00:00) (JST)
    70%
    No-show
    100%
    The penalty charges are based on the original rate of this room. However, if any discounts are applied, the incurred penalties will not exceed the total discounted amount of the reservation.The exchange rate is fixed when booking.

    Taxes & fees

    Included

    Consumption tax (from 1/10/2019) (Per person per night) 10%

  • *[East Wing 10 tatami mats ~ Japanese-style room or Japanese-Western style room with washroom and toilet] Up to 5 people! Spacious design.
    Only 3 rooms left!
    Free cancellation until 18 Sep
    Meal
    Breakfast
    Dinner
    Flash Coupon
    Price for:
    1 night
     | 
     | 
    AU$317.24
    Taxes & fees incl.

    Coupon

    *The discount is calculated based on the original price.
    Plan details

    [2 Meals Included] Enjoy the great nature of the Southern Alps and seasonal flavors!Relax in a 100% natural hot spring with free-flowing water <Convenient for hiking and sightseeing> [Breakfast] [Dinner]

    Free cancellation until 18/09/2026 11:59 p.m.(JST)

    Coupon

    *The discount is calculated based on the original price.

    [Our most popular hotel] Surrounded by the magnificent 100 famous mountains of the Southern Alps, Enjoy the mountain and food at this inn that boasts hot springs, with 1 night and 2 meals included. Ashiyasu Onsen is 100% spring water! It is a pure sulfate hot spring with no added water, and the soft, viscous water is highly satisfying and is expected to have effects on [beautiful skin] and [fatigue recovery]. ■Food: At the restaurant <Dinner> We serve Japanese kaiseki cuisine using seasonal domestic ingredients, mainly from the local area. The sweet vegetables and odorless river fish are renowned for their deliciousness. For meat dishes, we offer healthy wild boar pork, which is high in fat but low in calories and high in protein. *The menu may change depending on the season and availability of ingredients. <Breakfast> Breakfast is also made with locally produced ingredients, such as pickles, tofu, and river fish. ■Hot springs 100% natural spring water, pure and healing, unheated and undiluted ・Large open-air rock bath ・Rooftop open-air bath [temporarily unavailable due to construction] ・Large observation bath ・Small family bath (please inquire/not a private bath) [Spring quality] Sulfate spring (alkaline hypotonic high temperature spring)・Sodium・Calcium [Benefits] Beautiful skin・Relieves fatigue Recovery, muscle pain, joint pain, frozen shoulder, cold sensitivity, health promotion [Effects of drinking] Obesity, diabetes, chronic constipation, gout <You can take home drinkable "Ashiyasu Onsen"> We provide the secret hot spring, Ashiyasu Onsen, as drinkable hot spring water with a mellow taste Please use it for daily drinking water, health maintenance, beauty and storage water *Please bring your own container to take home ■Internet connection ・Free Wi-Fi available in the lobby ■Sightseeing in the area 〇Yashajin Pass hiking course From our hotel, it takes about 30 minutes to reach the trailhead, and about 1 hour to reach the summit observat

    Flash Coupon
    AU$317.24
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Breakfast
    • Dinner
    Cancellation policy
    Free cancellation deadline
    18/09/2026 11:59 p.m. (JST)
    3 day(s) before your stay (from 00:00) (JST)
    30%
    1 day(s) before your stay (from 00:00) (JST)
    50%
    0 day(s) before your stay (from 00:00) (JST)
    70%
    No-show
    100%
    The penalty charges are based on the original rate of this room. However, if any discounts are applied, the incurred penalties will not exceed the total discounted amount of the reservation.The exchange rate is fixed when booking.

    Taxes & fees

    Included

    Consumption tax (from 1/10/2019) (Per person per night) 10%

Room details

Japanese room, Non-smoking (Main building 8-tatami room (with external bath and toilet))

No smoking
Futon
13.0 m²
1–2 guests
Room facilities
  • Toilet available, no bath
  • TV
  • Electronic kettle
Amenities
  • Toothbrush sets
  • Bath towels
  • Face towels
  • Yukata
*[East Wing 10 tatami mats ~ Japanese-style room or Japanese-Western style room with washroom and toilet] Up to 5 people! Spacious design.
No smoking
Futon
16.2 m²
1–5 guests
Room facilities
  • Toilet available, no bath
  • TV
  • Electronic kettle
  • Toothbrush sets
  • Razors
  • Bath towels
  • *[East Wing 10 tatami mats ~ Japanese-style room or Japanese-Western style room with washroom and toilet] Up to 5 people! Spacious design.
    Only 2 rooms left!
    Free cancellation until 18 Sep
    Meal
    Breakfast
    Dinner
    Flash Coupon
    Price for:
    1 night
     | 
     | 
    AU$356.89
    Taxes & fees incl.

    Coupon

    *The discount is calculated based on the original price.
    Plan details

    [2 Meals Included] Enjoy the great nature of the Southern Alps and seasonal flavors!Relax in a 100% natural hot spring with free-flowing water <Convenient for hiking and sightseeing> [Breakfast] [Dinner]

    Free cancellation until 18/09/2026 11:59 p.m.(JST)

    Coupon

    *The discount is calculated based on the original price.

    [Our most popular hotel] Surrounded by the magnificent 100 famous mountains of the Southern Alps, Enjoy the mountain and food at this inn that boasts hot springs, with 1 night and 2 meals included. Ashiyasu Onsen is 100% spring water! It is a pure sulfate hot spring with no added water, and the soft, viscous water is highly satisfying and is expected to have effects on [beautiful skin] and [fatigue recovery]. ■Food: At the restaurant <Dinner> We serve Japanese kaiseki cuisine using seasonal domestic ingredients, mainly from the local area. The sweet vegetables and odorless river fish are renowned for their deliciousness. For meat dishes, we offer healthy wild boar pork, which is high in fat but low in calories and high in protein. *The menu may change depending on the season and availability of ingredients. <Breakfast> Breakfast is also made with locally produced ingredients, such as pickles, tofu, and river fish. ■Hot springs 100% natural spring water, pure and healing, unheated and undiluted ・Large open-air rock bath ・Rooftop open-air bath [temporarily unavailable due to construction] ・Large observation bath ・Small family bath (please inquire/not a private bath) [Spring quality] Sulfate spring (alkaline hypotonic high temperature spring)・Sodium・Calcium [Benefits] Beautiful skin・Relieves fatigue Recovery, muscle pain, joint pain, frozen shoulder, cold sensitivity, health promotion [Effects of drinking] Obesity, diabetes, chronic constipation, gout <You can take home drinkable "Ashiyasu Onsen"> We provide the secret hot spring, Ashiyasu Onsen, as drinkable hot spring water with a mellow taste Please use it for daily drinking water, health maintenance, beauty and storage water *Please bring your own container to take home ■Internet connection ・Free Wi-Fi available in the lobby ■Sightseeing in the area 〇Yashajin Pass hiking course From our hotel, it takes about 30 minutes to reach the trailhead, and about 1 hour to reach the summit observat

    Flash Coupon
    AU$356.89
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Breakfast
    • Dinner
    Cancellation policy
    Free cancellation deadline
    18/09/2026 11:59 p.m. (JST)
    3 day(s) before your stay (from 00:00) (JST)
    30%
    1 day(s) before your stay (from 00:00) (JST)
    50%
    0 day(s) before your stay (from 00:00) (JST)
    70%
    No-show
    100%
    The penalty charges are based on the original rate of this room. However, if any discounts are applied, the incurred penalties will not exceed the total discounted amount of the reservation.The exchange rate is fixed when booking.

    Taxes & fees

    Included

    Consumption tax (from 1/10/2019) (Per person per night) 10%

  • *[Men's open-air bath] All baths are 100% source water, with no heating or water circulation, making this a luxurious hot spring!
    Only 2 rooms left!
    Free cancellation until 18 Sep
    Meal
    Breakfast
    Dinner
    Flash Coupon
    Price for:
    1 night
     | 
     | 
    AU$356.89
    Taxes & fees incl.

    Coupon

    *The discount is calculated based on the original price.
    Plan details

    [Support for Mountaineers! Breakfast Onigiri and Special Benefit Plan]Relax in the hot spring before and after hiking[Includes 2 m [Breakfast] [Dinner]

    Free cancellation until 18/09/2026 11:59 p.m.(JST)

    Coupon

    *The discount is calculated based on the original price.

    [After hiking Mount Kitadake, get off at Hirogawara → Ashiyasu Onsen Bus Stop, which is right in front of our facility. Please be careful not to get off at the Ashiyasu Bus Stop before it.] \Supporting all hikers! Exciting plan with special benefits/ Half-price bathing after check-out (1,000 yen → 500 yen, tax included) Breakfast Onigiri provided for early morning departures Instead of breakfast, we will prepare an "Onigiri bento box." Regular breakfast is not included. If desired, please apply for a different plan. ==Bus operation period to the trailhead== Southern Alps Hiking Bus "Kofu, Ryuo, Ashiyasu Parking Lot ~ Hirogawara Line" 2026 ⇒ June 26 (Friday) ~ November 3 (Tuesday, holiday) Hirogawara ~ Kitazawa Pass Route Suspended =============== [Recommended routes in the area] Yashajin Pass Hiking Course Reach the trailhead in about 30 minutes from the inn and the summit observation deck in about 1 hour! You can enjoy the majestic view of the Shirane Sanzan in the Southern Alps (Kitadake, Ainodake, Notoridake)! Mount Kitadake, Mount Ainodake, and Mount Houousan Enjoy a refreshing ridge walk along a chain of 3,000-meter-class mountains! Advance reservations are required for mountain huts and tent sites. Please contact the Southern Alps Gateway (080-6775-7012 / 10:00–17:00). Please contact us in advance. Meals: Served at the dining area <Dinner> Offering Japanese banquet cuisine prepared with seasonal ingredients, primarily sourced locally and domestically. We offer healthy wild boar pork dishes that are low in calories and high in protein. * Menu content may change depending on the season and availability of ingredients. <Breakfast> We offer rice ball bento boxes, perfect for early morning departures. Hot Spring Ashiyasu Hot Spring offers 100% natural free-flowing hot spring water! A pure sulfate hot spring with no added water, The slightly soft and smooth hot spring water is known for its potential benefits in improving skin and relieving fatigue. This highly satisfying hot spring water is expected to have various effects (safe for drinking). - Large rock open-air bath ・Scenic large bath - Small family bath (Note: Please inquire in advance; this is not a private bath) [Spring quality] Sulfate hot spring (alkaline, hypotonic, high-temperature spring) containing sodium and calcium. [Effects] Improves skin health, relieves fatigue, eases muscle pain, joint pain, frozen shoulder, cold sensitivity, and promotes overall health. [Drinking effects] Beneficial for obesity, diabetes, chronic constipation, and gout. Other ・Free Wi-Fi available in the lobby We offer Ashiyasu Onsen, a secluded hot spring, as a mild-tasting drinkable hot spring water. *Please bring your own container for takeout.

    Flash Coupon
    AU$356.89
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Breakfast
    • Dinner
    Cancellation policy
    Free cancellation deadline
    18/09/2026 11:59 p.m. (JST)
    3 day(s) before your stay (from 00:00) (JST)
    30%
    1 day(s) before your stay (from 00:00) (JST)
    50%
    0 day(s) before your stay (from 00:00) (JST)
    70%
    No-show
    100%
    The penalty charges are based on the original rate of this room. However, if any discounts are applied, the incurred penalties will not exceed the total discounted amount of the reservation.The exchange rate is fixed when booking.

    Taxes & fees

    Included

    Consumption tax (from 1/10/2019) (Per person per night) 10%

Room details

Superior Japanese-western or Japanese room, Non-smoking ([East Wing] 10 tatami~)

No smoking
Futon
16.2 m²
1–5 guests
Room facilities
  • Toilet available, no bath
  • TV
  • Electronic kettle
Amenities
  • Toothbrush sets
  • Razors
  • Bath towels
  • Face towels
  • Slippers
  • Yukata