navigate to top page
  • Overview
  • Rooms & Plans
  • Reviews
  • Facilities
Business hotel

Hotel Platon Annex Green Plaza

Chikuma City, Nagano, Japan
Show on map

Starting at 1,073 JPY per person after the Go To Travel discount! Indulge yourself in our natural alkaline hot springs, selected as one of Japan's 100 most famous hot springs recommended by hot spring therapy professionals.

Guest review score

Good
Reviews: 125
3.8

Access

Togura Station
5 min drive
Chikuma Station
10 min drive
Sakaki Station
11 min drive

Property facilities

  • Parking lot
  • Sauna
  • Spa / Beauty salon
  • Restaurant
  • Lounge
  • Cafe

Explore our rooms and plans

Price (low to high)
3 room types
Single room
Smoking
1 x Semi-double bed
Mountain view
150.7 ft²
Max 2 adults / 1 child
Room facilities
  • Bath and toilet available
  • Internet available in room
  • In-room shelves
    Free cancellation until Jan 25
    No meal
    Price for:
    1 night
     | 
     | 
    $62.85
    Taxes & fees incl.
    Plan details

    <Room Only> Natural hot spring bath open all night Free parking & Wi-Fi Smok [Room only]

    Free cancellation until 1/25/2026 11:59 p.m.(JST)

    〜Affordable Room Only Plan〜 ・Check-in is at the neighboring 'Platon 2nd floor' [Attractive Features of Green Plaza] ・Clean, spacious rooms where you can go barefoot ・Free parking (Micro, large vehicles, and special vehicles incur a 1,100 yen fee) ・Free Wi-Fi in all rooms ・Smoking allowed in all rooms ・Sister facility's famous hot spring in Kamiyamada with midnight access, featuring 'natural flowing hot spring baths' ・Approximately 3-minute walk to the dining district, with plenty of options like izakaya (Japanese pubs), ramen, and sushi ・Free access to group inn hot springs within the onsen area (3 PM–9 PM) Waka-no-Yu, Yuzan, and Kashiwaya - the three inns' hot springs [Hot Springs] Across the road is the 'sister inn Platon’s natural hot spring' ・Enjoy a 24-hour, free-flowing hot spring directly sourced from the spring. Includes a low-temperature sauna. Relax and rejuvenate by sweating it out slowly and steadily Additionally, you can enjoy free hot spring hopping within the group inns 'Waka-no-Yu, Yuzan, and Kashiwaya' [For Guests Staying] Laundry facilities are available within the facility. Guests on the guest room floors of our facility are expected to go barefoot Enjoy the comfort of bare feet as you can place your luggage in your room, walk around after a bath, and relax without worrying about shoe areas. You can enjoy a relaxing time without concern for areas where shoes are worn. Shared shuttle bus from Togura Station To: Departure from Togura Station at 15:15 or 16:15 Return: Departing the hot spring town at 9:30 Advance reservation required (by 3 PM two days prior). Please enter your preferred time (either 15:15 or 16:15) in the remarks section when booking. Round-trip use only. (For one-way trips, please contact the accommodation directly. ) Reservations cannot be made without specifying your preferred time. As the bus departs on schedule, if you miss it, you will need to arrange your own transportation.

    $62.85
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Room only
    Cancellation policy
    Free cancellation deadline
    1/25/2026 11:59 p.m. (JST)
    7 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)
    100%
    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 10/1/2019) (Per person per night) 10%

    Excluded*

    Bathing tax (from 4/1/1950) (Per person per night)¥0

    * Excluded taxes and fees are approximated and may vary based on the property. They will be collected at the property at the time of check-in or check-out.

  • Single Room
    Free cancellation until Jan 25
    Meal
    Breakfast
    Price for:
    1 night
     | 
     | 
    $76.82
    Taxes & fees incl.
    Plan details

    <Daily special bento breakfast included> Natural hot spring baths accessible at [Breakfast]

    Free cancellation until 1/25/2026 11:59 p.m.(JST)

    〜Affordable breakfast-included plan〜 ・Check-in is at the neighboring 'Platon 2nd floor' ・Breakfast is also at the adjacent Platon 1st Floor 'Cute Dining Hall' Opening hours: 7:00 AM to 9:00 AM [Attractive Features of Green Plaza] ・Clean, spacious rooms where you can go barefoot ・Free parking (Micro, large vehicles, and special vehicles incur a 1,100 yen fee) ・Free Wi-Fi in all rooms ・Smoking allowed in all rooms ・Sister facility's famous hot spring in Kamiyamada with midnight access, featuring 'natural flowing hot spring baths' ・Approximately 3-minute walk to the dining district, with plenty of options like izakaya (Japanese pubs), ramen, and sushi ・Free access to group inn hot springs within the onsen area (3 PM–9 PM) Waka-no-Yu, Yuzan, and Kashiwaya - the three inns' hot springs [Hot Springs] Across the road is the 'sister inn Platon’s natural hot spring' ・Enjoy a 24-hour, free-flowing hot spring directly sourced from the spring. Includes a low-temperature sauna. Relax and rejuvenate by sweating it out slowly and steadily Additionally, you can enjoy free hot spring hopping within the group inns 'Waka-no-Yu, Yuzan, and Kashiwaya' [Next-door Sister Hotel’s Cute Cafeteria] Dinner Not Included Breakfast: Daily changing breakfast bento & side dish buffet (6:00 AM to 9:00 AM last call) [For Guests Staying] Laundry facilities are available within the facility. Guests on the guest room floors of our facility are expected to go barefoot Enjoy the comfort of bare feet as you can place your luggage in your room, walk around after a bath, and relax without worrying about shoe areas. You can enjoy a relaxing time without concern for areas where shoes are worn. Shared shuttle bus from Togura Station To: Departure from Togura Station at 15:15 or 16:15 Return: Departing the hot spring town at 9:30 Advance reservation required (by 3 PM two days prior). Please enter your preferred time (either 15:15 or 16:15) in the remarks section when booking. Round-trip use only. (For one-way trips, please contact the accommodation directly. ) Reservations cannot be made without specifying your preferred time. As the bus departs on schedule, if you miss it, you will need to arrange your own transportation.

    $76.82
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Breakfast
    Cancellation policy
    Free cancellation deadline
    1/25/2026 11:59 p.m. (JST)
    7 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)
    100%
    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 10/1/2019) (Per person per night) 10%

    Excluded*

    Bathing tax (from 4/1/1950) (Per person per night)¥0

    * Excluded taxes and fees are approximated and may vary based on the property. They will be collected at the property at the time of check-in or check-out.

Room details

[Semi-Double Smoking] Spacious and comfortable 120cm wide semi-double bed [Standard] [Semi-double room] [Single room] [Smoking] [Mountain view]

Smoking
1 x Semi-double bed
Mountain view
150.7 ft²
Max 2 adults / 1 child
Room facilities
  • Bath and toilet available
  • Internet available in room
A double room
Smoking
1 x Queen bed
172.2 ft²
Max 2 adults / 1 child
Room facilities
  • Internet available in room
  • In-room shelves
    Only 1 room left!
    Free cancellation until Jan 25
    No meal
    Price for:
    1 night
     | 
     | 
    $81.01
    Taxes & fees incl.
    Plan details

    <Room Only> Natural hot spring bath open all night Free parking & Wi-Fi Smok [Room only]

    Free cancellation until 1/25/2026 11:59 p.m.(JST)

    〜Affordable Room Only Plan〜 ・Check-in is at the neighboring 'Platon 2nd floor' [Attractive Features of Green Plaza] ・Clean, spacious rooms where you can go barefoot ・Free parking (Micro, large vehicles, and special vehicles incur a 1,100 yen fee) ・Free Wi-Fi in all rooms ・Smoking allowed in all rooms ・Sister facility's famous hot spring in Kamiyamada with midnight access, featuring 'natural flowing hot spring baths' ・Approximately 3-minute walk to the dining district, with plenty of options like izakaya (Japanese pubs), ramen, and sushi ・Free access to group inn hot springs within the onsen area (3 PM–9 PM) Waka-no-Yu, Yuzan, and Kashiwaya - the three inns' hot springs [Hot Springs] Across the road is the 'sister inn Platon’s natural hot spring' ・Enjoy a 24-hour, free-flowing hot spring directly sourced from the spring. Includes a low-temperature sauna. Relax and rejuvenate by sweating it out slowly and steadily Additionally, you can enjoy free hot spring hopping within the group inns 'Waka-no-Yu, Yuzan, and Kashiwaya' [For Guests Staying] Laundry facilities are available within the facility. Guests on the guest room floors of our facility are expected to go barefoot Enjoy the comfort of bare feet as you can place your luggage in your room, walk around after a bath, and relax without worrying about shoe areas. You can enjoy a relaxing time without concern for areas where shoes are worn. Shared shuttle bus from Togura Station To: Departure from Togura Station at 15:15 or 16:15 Return: Departing the hot spring town at 9:30 Advance reservation required (by 3 PM two days prior). Please enter your preferred time (either 15:15 or 16:15) in the remarks section when booking. Round-trip use only. (For one-way trips, please contact the accommodation directly. ) Reservations cannot be made without specifying your preferred time. As the bus departs on schedule, if you miss it, you will need to arrange your own transportation.

    $81.01
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Room only
    Cancellation policy
    Free cancellation deadline
    1/25/2026 11:59 p.m. (JST)
    7 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)
    100%
    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 10/1/2019) (Per person per night) 10%

    Excluded*

    Bathing tax (from 4/1/1950) (Per person per night)¥0

    * Excluded taxes and fees are approximated and may vary based on the property. They will be collected at the property at the time of check-in or check-out.

  • Single Room
    Only 1 room left!
    Free cancellation until Jan 25
    Meal
    Breakfast
    Price for:
    1 night
     | 
     | 
    $94.98
    Taxes & fees incl.
    Plan details

    <Daily special bento breakfast included> Natural hot spring baths accessible at [Breakfast]

    Free cancellation until 1/25/2026 11:59 p.m.(JST)

    〜Affordable breakfast-included plan〜 ・Check-in is at the neighboring 'Platon 2nd floor' ・Breakfast is also at the adjacent Platon 1st Floor 'Cute Dining Hall' Opening hours: 7:00 AM to 9:00 AM [Attractive Features of Green Plaza] ・Clean, spacious rooms where you can go barefoot ・Free parking (Micro, large vehicles, and special vehicles incur a 1,100 yen fee) ・Free Wi-Fi in all rooms ・Smoking allowed in all rooms ・Sister facility's famous hot spring in Kamiyamada with midnight access, featuring 'natural flowing hot spring baths' ・Approximately 3-minute walk to the dining district, with plenty of options like izakaya (Japanese pubs), ramen, and sushi ・Free access to group inn hot springs within the onsen area (3 PM–9 PM) Waka-no-Yu, Yuzan, and Kashiwaya - the three inns' hot springs [Hot Springs] Across the road is the 'sister inn Platon’s natural hot spring' ・Enjoy a 24-hour, free-flowing hot spring directly sourced from the spring. Includes a low-temperature sauna. Relax and rejuvenate by sweating it out slowly and steadily Additionally, you can enjoy free hot spring hopping within the group inns 'Waka-no-Yu, Yuzan, and Kashiwaya' [Next-door Sister Hotel’s Cute Cafeteria] Dinner Not Included Breakfast: Daily changing breakfast bento & side dish buffet (6:00 AM to 9:00 AM last call) [For Guests Staying] Laundry facilities are available within the facility. Guests on the guest room floors of our facility are expected to go barefoot Enjoy the comfort of bare feet as you can place your luggage in your room, walk around after a bath, and relax without worrying about shoe areas. You can enjoy a relaxing time without concern for areas where shoes are worn. Shared shuttle bus from Togura Station To: Departure from Togura Station at 15:15 or 16:15 Return: Departing the hot spring town at 9:30 Advance reservation required (by 3 PM two days prior). Please enter your preferred time (either 15:15 or 16:15) in the remarks section when booking. Round-trip use only. (For one-way trips, please contact the accommodation directly. ) Reservations cannot be made without specifying your preferred time. As the bus departs on schedule, if you miss it, you will need to arrange your own transportation.

    $94.98
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Breakfast
    Cancellation policy
    Free cancellation deadline
    1/25/2026 11:59 p.m. (JST)
    7 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)
    100%
    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 10/1/2019) (Per person per night) 10%

    Excluded*

    Bathing tax (from 4/1/1950) (Per person per night)¥0

    * Excluded taxes and fees are approximated and may vary based on the property. They will be collected at the property at the time of check-in or check-out.

Room details

[Scenic Twin Room] 120cm wide semi-double bed ★ Smoking allowed [Standard] [Double room] [Smoking]

Smoking
1 x Queen bed
172.2 ft²
Max 2 adults / 1 child
Room facilities
  • Internet available in room
Twin Room
Smoking
1 x Semi-double bed
River view
258.3 ft²
Max 2 adults / 1 child
Room facilities
  • Bath and toilet available
  • Internet available in room
  • In-room shelves
    Only 2 rooms left!
    Free cancellation until Jan 25
    No meal
    Price for:
    1 night
     | 
     | 
    $94.98
    Taxes & fees incl.
    Plan details

    <Room Only> Natural hot spring bath open all night Free parking & Wi-Fi Smok [Room only]

    Free cancellation until 1/25/2026 11:59 p.m.(JST)

    〜Affordable Room Only Plan〜 ・Check-in is at the neighboring 'Platon 2nd floor' [Attractive Features of Green Plaza] ・Clean, spacious rooms where you can go barefoot ・Free parking (Micro, large vehicles, and special vehicles incur a 1,100 yen fee) ・Free Wi-Fi in all rooms ・Smoking allowed in all rooms ・Sister facility's famous hot spring in Kamiyamada with midnight access, featuring 'natural flowing hot spring baths' ・Approximately 3-minute walk to the dining district, with plenty of options like izakaya (Japanese pubs), ramen, and sushi ・Free access to group inn hot springs within the onsen area (3 PM–9 PM) Waka-no-Yu, Yuzan, and Kashiwaya - the three inns' hot springs [Hot Springs] Across the road is the 'sister inn Platon’s natural hot spring' ・Enjoy a 24-hour, free-flowing hot spring directly sourced from the spring. Includes a low-temperature sauna. Relax and rejuvenate by sweating it out slowly and steadily Additionally, you can enjoy free hot spring hopping within the group inns 'Waka-no-Yu, Yuzan, and Kashiwaya' [For Guests Staying] Laundry facilities are available within the facility. Guests on the guest room floors of our facility are expected to go barefoot Enjoy the comfort of bare feet as you can place your luggage in your room, walk around after a bath, and relax without worrying about shoe areas. You can enjoy a relaxing time without concern for areas where shoes are worn. Shared shuttle bus from Togura Station To: Departure from Togura Station at 15:15 or 16:15 Return: Departing the hot spring town at 9:30 Advance reservation required (by 3 PM two days prior). Please enter your preferred time (either 15:15 or 16:15) in the remarks section when booking. Round-trip use only. (For one-way trips, please contact the accommodation directly. ) Reservations cannot be made without specifying your preferred time. As the bus departs on schedule, if you miss it, you will need to arrange your own transportation.

    $94.98
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Room only
    Cancellation policy
    Free cancellation deadline
    1/25/2026 11:59 p.m. (JST)
    7 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)
    100%
    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 10/1/2019) (Per person per night) 10%

    Excluded*

    Bathing tax (from 4/1/1950) (Per person per night)¥0

    * Excluded taxes and fees are approximated and may vary based on the property. They will be collected at the property at the time of check-in or check-out.

  • Single Room
    Only 2 rooms left!
    Free cancellation until Jan 25
    Meal
    Breakfast
    Price for:
    1 night
     | 
     | 
    $108.94
    Taxes & fees incl.
    Plan details

    <Daily special bento breakfast included> Natural hot spring baths accessible at [Breakfast]

    Free cancellation until 1/25/2026 11:59 p.m.(JST)

    〜Affordable breakfast-included plan〜 ・Check-in is at the neighboring 'Platon 2nd floor' ・Breakfast is also at the adjacent Platon 1st Floor 'Cute Dining Hall' Opening hours: 7:00 AM to 9:00 AM [Attractive Features of Green Plaza] ・Clean, spacious rooms where you can go barefoot ・Free parking (Micro, large vehicles, and special vehicles incur a 1,100 yen fee) ・Free Wi-Fi in all rooms ・Smoking allowed in all rooms ・Sister facility's famous hot spring in Kamiyamada with midnight access, featuring 'natural flowing hot spring baths' ・Approximately 3-minute walk to the dining district, with plenty of options like izakaya (Japanese pubs), ramen, and sushi ・Free access to group inn hot springs within the onsen area (3 PM–9 PM) Waka-no-Yu, Yuzan, and Kashiwaya - the three inns' hot springs [Hot Springs] Across the road is the 'sister inn Platon’s natural hot spring' ・Enjoy a 24-hour, free-flowing hot spring directly sourced from the spring. Includes a low-temperature sauna. Relax and rejuvenate by sweating it out slowly and steadily Additionally, you can enjoy free hot spring hopping within the group inns 'Waka-no-Yu, Yuzan, and Kashiwaya' [Next-door Sister Hotel’s Cute Cafeteria] Dinner Not Included Breakfast: Daily changing breakfast bento & side dish buffet (6:00 AM to 9:00 AM last call) [For Guests Staying] Laundry facilities are available within the facility. Guests on the guest room floors of our facility are expected to go barefoot Enjoy the comfort of bare feet as you can place your luggage in your room, walk around after a bath, and relax without worrying about shoe areas. You can enjoy a relaxing time without concern for areas where shoes are worn. Shared shuttle bus from Togura Station To: Departure from Togura Station at 15:15 or 16:15 Return: Departing the hot spring town at 9:30 Advance reservation required (by 3 PM two days prior). Please enter your preferred time (either 15:15 or 16:15) in the remarks section when booking. Round-trip use only. (For one-way trips, please contact the accommodation directly. ) Reservations cannot be made without specifying your preferred time. As the bus departs on schedule, if you miss it, you will need to arrange your own transportation.

    $108.94
    Taxes & fees incl.
    2 guests 1 night 1 room
    Meals
    • Breakfast
    Cancellation policy
    Free cancellation deadline
    1/25/2026 11:59 p.m. (JST)
    7 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)
    100%
    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 10/1/2019) (Per person per night) 10%

    Excluded*

    Bathing tax (from 4/1/1950) (Per person per night)¥0

    * Excluded taxes and fees are approximated and may vary based on the property. They will be collected at the property at the time of check-in or check-out.

Room details

[Scenic Twin Room] 120cm wide semi-double bed ★ Smoking allowed [Standard] [Twin room] [Smoking] [River view]

Smoking
1 x Semi-double bed
River view
258.3 ft²
Max 2 adults / 1 child
Room facilities
  • Bath and toilet available
  • Internet available in room