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Forest Resort Conifer Iwabitsu
forumWhat families say
4.24 out of 5 (389 reviews) on Rakuten Travel. Guests praise the natural onsen open-air bath, the star-filled night sky, dishes such as Joshu beef and Yamato pork, and the staff's attentive care.
Categories
Kids Facilities
Rental and Provided Childcare Gear
Rental and Provided Childcare Gear
An extensive range of childcare gear supports family trips with lots of luggage. Available to borrow or use: a crib, stroller, baby-bottle sterilizing kit, kettle for formula preparation, humidifier/air purifier, and children's yukata (90-120 cm).
- checkCrib
- checkStroller
- checkBaby-bottle sterilizing kit
- checkKettle for formula preparation
- checkHumidifier / air purifier
- checkChildren's yukata (sizes 90, 100, 110, 120 cm)
- checkWaterproof bed pad
- checkDiaper-only trash bin
- checkWet wipes
- checkChair
Natural Onsen Open-Air Bath, Natural Mineral Water Communal Bath and Sauna
Natural Onsen Open-Air Bath, Natural Mineral Water Communal Bath and Sauna
The open-air bath is a natural onsen (a calcium-sodium sulfate-chloride hot spring), where you can bathe while enjoying the fresh green of spring or the autumn leaves. The communal bath uses natural mineral water heated from Mt. Yakushi, with an authentic Finnish-style sauna also on site.
- •A baby bed is provided in the communal bath's changing area
- •Please confirm with the hotel whether children who are not yet toilet-trained may use the communal bath
- •There are reports that a baby bath chair is available in the changing area
Private-Hire Family Bath with Seasonal Views
Private-Hire Family Bath with Seasonal Views
A private-hire family bath offers views that change with the seasons, letting families bathe together in complete privacy. It's easy to use even with a small child, without worrying about other guests.
- •The private-hire family bath is by reservation; please notify the hotel at least 1 hour before you'd like to use it
- •The open-air bath is a natural onsen, but the communal bath and the private-hire family bath are not onsen water
Stream Play Area, Sports Grounds and Forest Craft Experience
Stream Play Area, Sports Grounds and Forest Craft Experience
About a 15-minute walk from the main building, there's a stream play area, along with sports facilities including a natural-grass field, tennis court, gymnasium and ground golf course. The Forest Craft Experience, using nuts and wood, is something both adults and children can get absorbed in.
Summer-Only Campground and Barbecue
Summer-Only Campground and Barbecue
- calendar_monthSeason:Summer only
The resort's campground allows tent camping in summer only, with barbecue and campfires also available. It's equipped with a cooking area, an outdoor refrigerator and a shower room.
Kaiseki Dinner and Regional Gourmet Plans
Kaiseki Dinner and Regional Gourmet Plans
Dinner is a kaiseki set menu served at the restaurant Shiki. Regional gourmet plans are also available, including Joshu beef steak and medicinal-herb shabu-shabu with Yamato pork. Breakfast is a buffet in the restaurant hall.
- •Co-sleeping children under school age (ages 0-2), on a no-meal, no-futon plan, stay free of charge
Overview
Forest Resort Conifer Iwabitsu is a 56,000-tsubo nature resort at Agatsuma-kyo Onsen in Gunma. The open-air bath is a natural onsen, and the communal bath is heated with natural mineral water from Mt. Yakushi, alongside a Finnish-style sauna and a private-hire family bath. The hotel offers an extensive lineup of childcare gear to borrow or use - including a crib, stroller and baby-bottle sterilizing kit - and co-sleeping children aged 0-2 stay free of charge (no meals, no futon). With Japanese-style tatami rooms, authentic log cabins, a campground, sports grounds and a stream play area, it's a resort built for families to spend time together.
Forest Resort Conifer Iwabitsu is a sprawling 56,000-tsubo forest resort in Higashiagatsuma, Gunma Prefecture, at Agatsuma-kyo Onsen. Alongside the tatami and Western-style rooms in the main building, it offers authentic log cabins built from logs imported from Canada, and a campground open in summer only, making it suitable for everything from family trips to group retreats. Surrounded by birdsong and the scent of the trees, guests can relax under a sky full of stars.
Baths
The signature open-air bath is a natural onsen (a calcium-sodium sulfate-chloride hot spring, classified as hypotonic and weakly alkaline, high-temperature), where you can bathe while taking in the fresh green of spring or the autumn foliage. The communal bath uses mineral-rich natural water heated from Mt. Yakushi, with an authentic Finnish-style sauna attached. There is also a private-hire family bath overlooking views that change with the seasons, letting families bathe together in private. A baby bed is also provided in the communal bath's changing area.
Childcare Gear and Traveling with a Baby
An extensive lineup of childcare gear supports family trips with lots of luggage. Available to borrow or use: a crib, air purifier, humidifier, children's yukata (sizes 90, 100, 110 and 120 cm), stroller, baby-bottle sterilizing kit, kettle for formula preparation, waterproof bed pad, a chair, wet wipes, and a diaper-only trash bin. Co-sleeping children under school age stay free of charge, with no meals or futon included.
Dining
Dinner is served at the restaurant Shiki, offering a kaiseki set menu built around seasonal mountain-village ingredients. Regional gourmet plans are also available, including Joshu beef steak (a Gunma brand) and medicinal-herb shabu-shabu using Yamato pork, a Gunma specialty. Some menus use seafood delivered directly from an affiliated fish market, and breakfast is a buffet in the restaurant hall, filled with dappled sunlight.
Rooms
There are 13 Japanese-style tatami rooms and 12 Western-style rooms (for 2 or 4 guests), plus a variety of log cabins - barrier-free Western-style, Japanese-Western style, cabins with a piano, and pet-friendly cabins. Tatami rooms are also available, making the layout comfortable for families traveling with a crawling-age baby.
Play and Activities
On the grounds you'll find sports facilities including a natural-grass field, an all-weather tennis court, a gymnasium and a ground golf course, plus table tennis, barbecue and campfires. There's plenty to enjoy in nature, including a stream play area about 15 minutes on foot from the main building, and a "Forest Craft Experience" where you make things from nuts and wood. Nearby are the ruins of Iwabitsu Castle, Fudo Falls, and family-friendly hiking trails.
Access & Information
| location_onAddress | 4399 Haramachi, Higashiagatsuma-machi, Agatsuma-gun, Gunma 377-0801 |
|---|---|
| directions_carAccess | About 8 minutes by free shuttle bus from Gunma-Haramachi Station on the JR Agatsuma Line (shuttle runs until 6 p.m.). An irregular free bus also runs from Asagaya. |
| trainNearest station | Gunma-Haramachi Station (JR Agatsuma Line) |
| local_parkingParking | Free parking for 30 cars (no reservation needed). |
| callPhone | +81-279-68-5338 |
| paymentsCards | VISA, JCB, American Express, Diners Club, Mastercard |
| languageOfficial site | https://www.iwabitsu.co.jp/open_in_new |
Reference price as of August 28, 2026 (stay date 2026-09-19). Please check the booking site for actual rates.
Frequently Asked Questions
Do children stay free, and is a crib available?
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Yes, for young children. Co-sleeping children under school age aged 0-2 stay free of charge on a plan with no meals or futon. A crib can also be borrowed from the hotel's childcare-gear lineup; whether there is a charge for it is not stated, so please confirm with the hotel.
Is there a baby bed in the communal bath, and can babies who aren't toilet-trained use it?
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A baby bed is provided in the communal bath's changing area, and there are reports that a baby bath chair is available there too. Whether children who are not yet toilet-trained can use the communal bath is not stated, so please confirm with the hotel directly.
Is the open-air bath a real onsen, and can we bathe privately as a family?
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Yes. The open-air bath is a natural onsen. The hotel also has a private-hire family bath with seasonal views (reservation required, at least 1 hour ahead); note that the communal bath and the private-hire family bath are not onsen water.
What's dinner like, and are there kid-friendly meal options?
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Dinner is a kaiseki set menu at the restaurant Shiki, with regional gourmet plans such as Joshu beef steak and Yamato pork shabu-shabu. Breakfast is a buffet in the restaurant hall. Co-sleeping children aged 0-2 can also stay on a no-meal, no-futon plan free of charge.
How do we get there from the station, and is parking available?
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From Gunma-Haramachi Station on the JR Agatsuma Line, a free shuttle bus takes about 8 minutes (running until 6 p.m.). An irregular free bus also runs from Asagaya. Parking is free for 30 cars, and no reservation is needed.
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Information on this page was compiled by directly consulting Official website, Rakuten Travel, Jalan (last verified: August 2026). Prices, availability and seasonal operations change — please check each booking site for the latest information.
We take care to keep information accurate, but always confirm the latest details on the hotel's official site and booking sites before you book or visit.