Azuma Farm Koiwai, located at the foot of Mt. Iwate on the grounds of Koiwai Farm (小岩井農場), will begin supplying natural hot spring water on Friday, November 20, 2026. A spa treatment service, "Forest Springs SPA," will follow on Tuesday, December 1.
Official website (Japanese): https://azumafarms.com/ja/
Note: Reservations for SPA treatments on or after Tuesday, December 1 are now being accepted.
A Natural Hot Spring Rising From 1,000 m Underground
The newly offered "Koiwai Onsen No. 1" (小岩井温泉1号) is a mineral-rich natural hot spring that rises from 1,000 m underground. Its spring quality is "sodium-sulfate/chloride/bicarbonate spring," classified as a hypotonic, neutral, high-temperature spring. The water has a pale yellow tint with almost no cloudiness or odor, and it is a neutral water said to be gentle on the skin.
The hot spring water is supplied as a free-flowing (kakenagashi) bath to all guest rooms and to the sauna building, "Forest Springs." Guests can soak in their rooms or combine the wood-fired sauna with the hot spring, depending on how they wish to spend their stay.
- Hot spring name: Koiwai Onsen No. 1 (小岩井温泉1号)
- Spring quality: Sodium-sulfate/chloride/bicarbonate spring
- Classification: Hypotonic, neutral, high-temperature spring
- Drilling depth: 1,000 m underground
- General indications: Recovery from fatigue, promotion of health, chronic pain and stiffness in muscles and joints, sensitivity to cold, and others
- Indications by spring quality: Cuts, impaired peripheral circulation, sensitivity to cold, depressive states, dry skin
- Supplied to: All guest rooms and the sauna building "Forest Springs"
Forest Springs
Guest room bathroom
"Forest Springs SPA," Inspired by Nature and the Five Elements
"Forest Springs SPA" draws on the idea of the Five Elements (五行), which views nature as a connection of wood, fire, earth, metal, and water. The forest that has been carefully nurtured, the flames of the wood-fired sauna, the land of Mt. Iwate, heated stones (温石), and the hot spring are layered onto the five elements, inviting guests into a time to rest the mind and body in harmony with nature.
- Wood | Forest: Breathe deeply with the breath of the forest
- Fire | Wood-fired sauna: Feel the warmth of the burning logs
- Earth | Mt. Iwate: Feel the power of the earth in the majestic mountain
- Metal | Heated stones: Surrender yourself to the warmth of the heated stones
- Water | Hot spring: Let the soft water unwind the heart
Two body massage menus are available, and the treatment time can be chosen from 90 or 120 minutes. A therapist comes to the guest room or to the sauna building "Forest Springs" for the treatment. After a treatment in the guest room, guests can rest without moving, still wrapped in its afterglow. Guests who use the sauna can also receive a treatment in the same building once they have finished and feel refreshed. The treatments are designed to connect the lingering warmth with the massage in a gentle flow.
BODY MASSAGE MENU
Signature Body Massage (シグネチャー ボディマッサージ)
90 minutes: ¥50,000 / 120 minutes: ¥70,000 (including tax and service charge)
A full-body treatment that combines a horsehair brush, heated stones, and the therapist's hands. The brush uses horsehair suited to human skin. The brushing is intended to have a healing effect by promoting blood circulation, and the treatment incorporates the gentle heat of the heated stones and the warmth of the hands. The therapist adjusts pressure and rhythm to the guest's condition and breathing, aiming for relaxation of the mind and body.
Customized Body Massage (カスタマイズド ボディマッサージ)
90 minutes: ¥45,000 / 120 minutes: ¥65,000 (including tax and service charge)
A body treatment tailored to the guest's condition and wishes on the day. Through a consultation, the therapist asks about areas of concern and preferred pressure, and builds the treatment to fit the chosen length of time. It can focus on areas that need particular care or cover the whole body slowly, with a comfort level suited to each guest.
Note: If you use only the body massage, it will be provided in your guest room or in a separate room.
About Forest Springs
Azuma Farm Koiwai has three private sauna buildings, called Forest Springs, each covering 89 m². In addition to a wood-fired sauna and a cold plunge bath, each building has relaxing chairs arranged around a fireplace and a daybed from which guests can enjoy the surrounding nature. The setting is meant to let guests step away from the bustle of daily life amid the nature of Koiwai and relax in body and mind.
Price: ¥55,000 including tax / 2-hour session
Azuma Farm Koiwai Facility Overview
- Facility name: AZUMA FARM Koiwai
- Address: 68-77 Maruyachi, Shizukuishi-cho, Iwate-gun, Iwate Prefecture
- Number of guest rooms: 24
- Additional facilities: Restaurant and lounge building, 3 private saunas
- Site area / building area: Approximately 8 ha / approximately 4,000 m²
- Rate: From ¥235,400 per room for 2 guests (including tax and service charge). This is an all-inclusive rate that covers breakfast and dinner, complimentary transfers between the property and Morioka Station, and on-site activities.
- Official website: https://azumafarms.com/
