Adventures Island Koyaruzawa Lodge

~Opening in April 2025~ Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Eligible stay period: ~April 29, 2026, May 6, 2026 ~ June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) *Forest Spa Business Hours: 10:00 AM ~ 10:00 PM (Last admission 9:00 PM)* A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Featuring fresh ingredients from Boso, we have prepared a visually stunning menu. Time: 7:00 AM ~ 9:30 AM (Last Order 9:00 AM) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Centered on fresh ingredients from Boso, we offer a visually stunning menu. Time: 7:00–9:30 (Last Order: 9:00) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

~Opening in April 2025~ Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Eligible stay period: ~April 29, 2026, May 6, 2026 ~ June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) *Forest Spa Business Hours: 10:00 AM ~ 10:00 PM (Last admission 9:00 PM)* A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Featuring fresh ingredients from Boso, we have prepared a visually stunning menu. Time: 7:00 AM ~ 9:30 AM (Last Order 9:00 AM) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Centered on fresh ingredients from Boso, we offer a visually stunning menu. Time: 7:00–9:30 (Last Order: 9:00) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: "Kotariru Onsen Mori no Yu" Free Pass Included! Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu Free Pass is provided only to guests who have reserved a stay during the above-mentioned eligible accommodation period along with a ticket-included accommodation plan. Guests will receive one pass per person at check-in. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. This plan is a room-only plan where you can spend time with your beloved dog. Regarding dinner: Reservations can be made through the official site under 'Restaurant Menu Information'. * Final reception: 2 days prior by 16:00 Please refrain from bringing your dog to the restaurant. [Dog Run Information] Guests staying with their dogs are provided with a dog run pass for 'Kotani no Sato Doggies Island'. The dog run, with a total area of approximately 10,000 square meters of natural grass, can accommodate various breeds from small to large dogs. You may use it as many times as you like during your stay. Approximately 15 minutes on foot, 5 minutes by car (Paid parking: 800 yen) There is no dog run within the Adventures Island Kotani Ryuzawa Lodge. [Information and Precautions] ・Participation in workshops and activities incurs additional fees. ・For staying with your dog, a fee of 5,500 yen (tax included) per dog per night will be charged at the venue. ・At check-in, please present proof of rabies vaccination within the past year and valid proof of 5 or more combined vaccinations within their expiration date. ・The outdoor terrace seating at the cafe & dining area is available for use with your beloved dog. We kindly ask that you refrain from bringing your dog to other restaurant areas.

~Opening in April 2025~ Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Eligible stay period: ~April 29, 2026, May 6, 2026 ~ June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) *Forest Spa Business Hours: 10:00 AM ~ 10:00 PM (Last admission 9:00 PM)* A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Featuring fresh ingredients from Boso, we have prepared a visually stunning menu. Time: 7:00 AM ~ 9:30 AM (Last Order 9:00 AM) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Centered on fresh ingredients from Boso, we offer a visually stunning menu. Time: 7:00–9:30 (Last Order: 9:00) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: "Kotariru Onsen Mori no Yu" Free Pass Included! Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu Free Pass is provided only to guests who have reserved a stay during the above-mentioned eligible accommodation period along with a ticket-included accommodation plan. Guests will receive one pass per person at check-in. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. This plan is a room-only plan where you can spend time with your beloved dog. Regarding dinner: Reservations can be made through the official site under 'Restaurant Menu Information'. * Final reception: 2 days prior by 16:00 Please refrain from bringing your dog to the restaurant. [Dog Run Information] Guests staying with their dogs are provided with a dog run pass for 'Kotani no Sato Doggies Island'. The dog run, with a total area of approximately 10,000 square meters of natural grass, can accommodate various breeds from small to large dogs. You may use it as many times as you like during your stay. Approximately 15 minutes on foot, 5 minutes by car (Paid parking: 800 yen) There is no dog run within the Adventures Island Kotani Ryuzawa Lodge. [Information and Precautions] ・Participation in workshops and activities incurs additional fees. ・For staying with your dog, a fee of 5,500 yen (tax included) per dog per night will be charged at the venue. ・At check-in, please present proof of rabies vaccination within the past year and valid proof of 5 or more combined vaccinations within their expiration date. ・The outdoor terrace seating at the cafe & dining area is available for use with your beloved dog. We kindly ask that you refrain from bringing your dog to other restaurant areas.

~Opening in April 2025~ Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Eligible stay period: ~April 29, 2026, May 6, 2026 ~ June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) *Forest Spa Business Hours: 10:00 AM ~ 10:00 PM (Last admission 9:00 PM)* A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Featuring fresh ingredients from Boso, we have prepared a visually stunning menu. Time: 7:00 AM ~ 9:30 AM (Last Order 9:00 AM) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Centered on fresh ingredients from Boso, we offer a visually stunning menu. Time: 7:00–9:30 (Last Order: 9:00) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: "Kotariru Onsen Mori no Yu" Free Pass Included! Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu Free Pass is provided only to guests who have reserved a stay during the above-mentioned eligible accommodation period along with a ticket-included accommodation plan. Guests will receive one pass per person at check-in. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. This plan is a room-only plan where you can spend time with your beloved dog. Regarding dinner: Reservations can be made through the official site under 'Restaurant Menu Information'. * Final reception: 2 days prior by 16:00 Please refrain from bringing your dog to the restaurant. [Dog Run Information] Guests staying with their dogs are provided with a dog run pass for 'Kotani no Sato Doggies Island'. The dog run, with a total area of approximately 10,000 square meters of natural grass, can accommodate various breeds from small to large dogs. You may use it as many times as you like during your stay. Approximately 15 minutes on foot, 5 minutes by car (Paid parking: 800 yen) There is no dog run within the Adventures Island Kotani Ryuzawa Lodge. [Information and Precautions] ・Participation in workshops and activities incurs additional fees. ・For staying with your dog, a fee of 5,500 yen (tax included) per dog per night will be charged at the venue. ・At check-in, please present proof of rabies vaccination within the past year and valid proof of 5 or more combined vaccinations within their expiration date. ・The outdoor terrace seating at the cafe & dining area is available for use with your beloved dog. We kindly ask that you refrain from bringing your dog to other restaurant areas.

~Opening in April 2025~ Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Eligible stay period: ~April 29, 2026, May 6, 2026 ~ June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) *Forest Spa Business Hours: 10:00 AM ~ 10:00 PM (Last admission 9:00 PM)* A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Featuring fresh ingredients from Boso, we have prepared a visually stunning menu. Time: 7:00 AM ~ 9:30 AM (Last Order 9:00 AM) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Centered on fresh ingredients from Boso, we offer a visually stunning menu. Time: 7:00–9:30 (Last Order: 9:00) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

~Opening in April 2025~ Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Eligible stay period: ~April 29, 2026, May 6, 2026 ~ June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) *Forest Spa Business Hours: 10:00 AM ~ 10:00 PM (Last admission 9:00 PM)* A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Featuring fresh ingredients from Boso, we have prepared a visually stunning menu. Time: 7:00 AM ~ 9:30 AM (Last Order 9:00 AM) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'

***Pool available! Enjoy it all year round, regardless of the season.*** Limited-time offer: Includes free pass ticket to "Kotanryu Onsen Mori no Yu"! Indulge in the luxurious waters sourced from the land surrounded by the rich nature of Kotanryu. Relax in the spacious indoor and outdoor baths, enjoying their gentle spring quality that warms you from deep within and eases your fatigue. Applicable stay periods: ~April 29, 2026, and May 6, 2026~June 29, 2026 Limited-time benefit: Free pass to Kotanryu Onsen Mori no Yu During your stay (from check-in day to check-out day), you can use the adjacent "Kotanryu Onsen Mori no Yu." You can use it as many times as you like. The Mori no Yu free pass ticket will only be provided at check-in to guests who booked accommodation within the applicable stay periods and with a ticket-included plan. One ticket will be provided per person at check-in. "Kotanryu Onsen Mori no Yu" is located approximately 10 minutes on foot or 3 minutes by car from our facility. Use of Mori no Yu by dogs is not permitted. Mori no Yu opening hours: 10:00–22:00 (last admission at 21:00) Separate charges apply for adult lounge wear and use of the relaxation room. A power breakfast to energize your day. * Please check the official website of 'Koyaru-no-Yu Onsen Forest Hot Spring' for bathing-related guidelines. Surrounded by seasonal flowers and greenery, enjoy a dialogue with nature while having fun at 'Adventures Island Kotaruzawa Lodge.' Relax in one of the seven uniquely varied and high-quality room types, making you feel at home. Breakfast Enjoy a 'Brekkie Style' plate featuring items like sausages, bacon, and sunny-side-up eggs served on a single plate. Featuring a visually stunning menu focused on fresh ingredients from the Boso region. Centered on fresh ingredients from Boso, we offer a visually stunning menu. Time: 7:00–9:30 (Last Order: 9:00) Location: Restaurant [Dinner] Reservations can be made via the 'Restaurant Menu Information' on the official website. * Final reception: 2 days prior by 16:00 [Information and Notes Regarding Accommodation] ・Participation in workshops and activities incurs additional fees. ・Guests staying with their beloved dogs are requested to make a reservation using the 'Plan Exclusively for Stays with Dogs.'