Natural Hot Spring 'OYUGIWA Niiza Onsen' Grand Opening in Niiza City, Saitama on May 27, 2026!
Aeon Fantasy will open its third OYUGIWA brand facility in Niiza City, Saitama, featuring natural 'Black Hot Spring' water, a 10,000-book manga library, and authentic saunas to serve as a multi-generational community hub.
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- 📰 Published: April 27, 2026 at 20:30
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Aeon Fantasy Co., Ltd. (Headquarters: Chiba City, Chiba; President: Tokuya Fujiwara) will celebrate the grand opening of 'OYUGIWA Niiza Onsen,' the third branch of its bathhouse brand 'OYUGIWA,' in Niiza City, Saitama, on Wednesday, May 27, 2026.
OYUGIWA Niiza Onsen inherits a famous local spring loved by the community while completely renovating saunas, relaxation areas, and dining facilities to suit modern lifestyles. In addition to the signature 'Kuroyu' (natural black water) hot springs, the facility offers unlimited reading of approximately 10,000 comics and magazines for the entrance fee alone, a spacious kids' corner, and a monthly 'Senior Passport,' providing a space where everyone from children to seniors can enjoy themselves all day.
OYUGIWA Official Website: https://www.fantasy.co.jp/oyugiwa/
■ Pre-Opening Campaign held at the store ahead of the Grand Opening
Members can enjoy a waiver of the 100 yen registration fee, receive one free admission ticket with the purchase of a coupon book, and the first 200 customers each day will receive an original towel.
Period: May 15 (Fri) – 17 (Sun), 2026, 13:00–17:00
■ 8 Attractions of 'OYUGIWA Niiza Onsen'
1. Natural Hot Spring 'Bihada no Kuroyu' (Beautifying Black Water)
Featuring a smooth and gentle touch, the 'Kuroyu' natural spring is a gift from nature nurtured over thousands of years in the soil of Niiza. It warms the body from the core and provides beautifying skin effects.
2. Fulfilling Relaxation Spaces Included in the Entrance Fee
The following facilities can be used all day at no extra cost:
- Unlimited reading of approximately 10,000 manga and magazines, from the latest hits to classics!
- A spacious women-only relaxation room for peace of mind.
- A kids' corner with a ball pool, vehicles, and a circuit for families to enjoy together.
3. Authentic 'Loyly' using Shizuoka Tea Leaves
In the auto-loyly sauna, we conduct loyly using tea leaves from Shizuoka Prefecture. Guests can enjoy a premium sauna experience enveloped in the rich aroma of tea. Guest 'heat masters' (neppashi) are also scheduled to visit for the opening events.
4. Body-friendly 'Healthy Meals'
The restaurant offers a carefully selected menu that is both delicious and health-conscious. These are OYUGIWA's signature 'heartfelt meals' designed to satisfy everyone from children to seniors.
5. Refreshing 'Detox Water' to Hydrate After Bathing
'Detox Water' is available for purchase to replenish fluids after a refreshing sweat. It is a highly recommended item, especially for female guests.
6. Women-only area 'Aataka Room' with Warm Floors
The spacious women-only area offers two types of rooms:
- 'Kurotsugi Room': A blissful space where you can relax and lie down while reading manga or magazines.
- 'Oyasumi Room': Recommended for those who want a quiet rest. The warm floor supports deep sleep. Yoga events are also planned for this area.
7. Enriching Daily Life with the Monthly 'Senior Passport'
We will introduce the 'Senior Passport,' which has been well-received at existing locations. For 8,900 yen (tax incl.) per month, seniors can enjoy unlimited entry every day until 17:00! Please use it for health maintenance and social interaction.
8. Amusement Corner for All Generations
A corner featuring crane games and rides allows families and friends to enjoy a peaceful moment after their bath.
■ Store Overview
Address: 2-1-5 Honda, Niiza City, Saitama 352-0022 (Near Niiza City General Gymnasium)
Phone: 048-481-0313
Business Hours: 9:00 – 25:00 (Last entry 24:30)
Restaurant: 10:00 – 23:00 (Last order 22:30)
Entrance Fee (Adult): Weekdays 900 yen / Weekends & Holidays 1,000 yen
Entrance Fee (Child): 400 yen (3 years old to elementary school)
■ Brand Concept: 'Warming the area around the water with smiles.'
Let's take care of everything around the hot spring (the edge/giwa). At OYUGIWA, which was born from this thought, our staff works passionately every day to bring smiles to everyone who gathers here.
OYUGIWA Niiza Onsen inherits a famous local spring loved by the community while completely renovating saunas, relaxation areas, and dining facilities to suit modern lifestyles. In addition to the signature 'Kuroyu' (natural black water) hot springs, the facility offers unlimited reading of approximately 10,000 comics and magazines for the entrance fee alone, a spacious kids' corner, and a monthly 'Senior Passport,' providing a space where everyone from children to seniors can enjoy themselves all day.
OYUGIWA Official Website: https://www.fantasy.co.jp/oyugiwa/
■ Pre-Opening Campaign held at the store ahead of the Grand Opening
Members can enjoy a waiver of the 100 yen registration fee, receive one free admission ticket with the purchase of a coupon book, and the first 200 customers each day will receive an original towel.
Period: May 15 (Fri) – 17 (Sun), 2026, 13:00–17:00
■ 8 Attractions of 'OYUGIWA Niiza Onsen'
1. Natural Hot Spring 'Bihada no Kuroyu' (Beautifying Black Water)
Featuring a smooth and gentle touch, the 'Kuroyu' natural spring is a gift from nature nurtured over thousands of years in the soil of Niiza. It warms the body from the core and provides beautifying skin effects.
2. Fulfilling Relaxation Spaces Included in the Entrance Fee
The following facilities can be used all day at no extra cost:
- Unlimited reading of approximately 10,000 manga and magazines, from the latest hits to classics!
- A spacious women-only relaxation room for peace of mind.
- A kids' corner with a ball pool, vehicles, and a circuit for families to enjoy together.
3. Authentic 'Loyly' using Shizuoka Tea Leaves
In the auto-loyly sauna, we conduct loyly using tea leaves from Shizuoka Prefecture. Guests can enjoy a premium sauna experience enveloped in the rich aroma of tea. Guest 'heat masters' (neppashi) are also scheduled to visit for the opening events.
4. Body-friendly 'Healthy Meals'
The restaurant offers a carefully selected menu that is both delicious and health-conscious. These are OYUGIWA's signature 'heartfelt meals' designed to satisfy everyone from children to seniors.
5. Refreshing 'Detox Water' to Hydrate After Bathing
'Detox Water' is available for purchase to replenish fluids after a refreshing sweat. It is a highly recommended item, especially for female guests.
6. Women-only area 'Aataka Room' with Warm Floors
The spacious women-only area offers two types of rooms:
- 'Kurotsugi Room': A blissful space where you can relax and lie down while reading manga or magazines.
- 'Oyasumi Room': Recommended for those who want a quiet rest. The warm floor supports deep sleep. Yoga events are also planned for this area.
7. Enriching Daily Life with the Monthly 'Senior Passport'
We will introduce the 'Senior Passport,' which has been well-received at existing locations. For 8,900 yen (tax incl.) per month, seniors can enjoy unlimited entry every day until 17:00! Please use it for health maintenance and social interaction.
8. Amusement Corner for All Generations
A corner featuring crane games and rides allows families and friends to enjoy a peaceful moment after their bath.
■ Store Overview
Address: 2-1-5 Honda, Niiza City, Saitama 352-0022 (Near Niiza City General Gymnasium)
Phone: 048-481-0313
Business Hours: 9:00 – 25:00 (Last entry 24:30)
Restaurant: 10:00 – 23:00 (Last order 22:30)
Entrance Fee (Adult): Weekdays 900 yen / Weekends & Holidays 1,000 yen
Entrance Fee (Child): 400 yen (3 years old to elementary school)
■ Brand Concept: 'Warming the area around the water with smiles.'
Let's take care of everything around the hot spring (the edge/giwa). At OYUGIWA, which was born from this thought, our staff works passionately every day to bring smiles to everyone who gathers here.