BUB Inc. (Shibuya-ku, Tokyo), which runs the sports beauty brand "ONE BREATH," is holding a collaboration event from Thursday, October 1 to Wednesday, October 14, 2026 at "saunahouse," an urban sauna facility inside LA CITTADELLA in Kawasaki, Kanagawa Prefecture. The company announced it on September 18.
saunahouse is operated by REX Co., Ltd., and its men's and women's floors have identical specifications. This is the first time it has worked with ONE BREATH.
Try ONE BREATH's new products in advance on both the men's and women's floors
ONE BREATH's philosophy is "Breath becomes the energy of beauty." The company says the time spent catching your breath after a sauna overlaps with the brand's world view, so it is letting visitors try new products, including ones for skin after the sauna and cold plunge, on both the men's floor and the women's floor.
"Micro O2 Bubble Face Wash" is a face wash whose liquid, once pumped onto the skin and left for several tens of seconds, turns into a fluffy foam. The company says it is designed to leave skin feeling clean and refreshed while keeping friction to a minimum.
"Melt O2 Cleansing Gel" is a cleanser with a water-based gel base and the oil-soluble ingredient LHA (capryloyl salicylic acid). It removes makeup and sebum while leaving skin feeling less tight. It also contains moisturizing ingredients such as houttuynia cordata extract and hyaluronic acid.
"On Lip Tint" is a tinted lip color that the brand says stays put through meals and friction from masks, with a cool, refreshing feel from menthol. The "On Lip Tint Key Loop," which comes with a charm, is also available.
Visitor-only gacha, plus a travel set for following on social media
During the event, an original ONE BREATH gacha will be available to visitors. The prizes are goods exclusive to this event, including ONE BREATH skincare items and limited-edition stickers commemorating the collaboration with saunahouse.
Follow the official ONE BREATH Instagram or TikTok account to receive a "Micro O2 Bubble Face Wash Travel Set (2 uses)."
* The gacha and the gift are limited to one per person.
* The prizes and the gift end when they run out.
A sauna facility occupying an entire building, with five saunas and four cold plunge pools
saunahouse is an urban sauna facility that opened inside LA CITTADELLA on January 23, 2025. An entire six-story building was designed for saunas, and each of the men's and women's floors has five saunas with different structures, lighting and music, four cold plunge pools at different temperatures, and a warm bath.
The outdoor air-bathing area, "VERANDA," has scented showers and sun loungers. Towels and amenities are provided, so you can visit empty-handed.
ONE BREATH × saunahouse collaboration: dates, venue and fees
- Name: ONE BREATH × saunahouse collaboration
- Period: Thursday, October 1 to Wednesday, October 14, 2026
- Hours: 9:00-23:00 (last entry 21:30), open every day (saunahouse business hours)
- Venue: saunahouse (inside LA CITTADELLA), men's floor and women's floor
- Address: 5-1 Ogawacho, Kawasaki-ku, Kawasaki, Kanagawa 210-0023
- Access: About a 5-minute walk from the east exit of JR "Kawasaki Station" / about a 7-minute walk from "Keikyu Kawasaki Station"
- Facility fees: Weekdays ¥2,300 for 2 hours, ¥2,700 for 3 hours, ¥3,300 for free time (loungewear service included)
Weekends and holidays ¥2,950 for 2 hours, ¥3,350 for 3 hours, ¥3,950 for free time (loungewear service included)
Extension ¥550 per hour - Organizer: BUB Inc. (ONE BREATH)
- Operator: REX Co., Ltd.
* During regular operation, the facility is used without clothing. The release does not state whether the fees include tax.
ONE BREATH is a sports beauty brand launched in December 2025, focusing on the skin environment of modern people who are constantly on the move, exposed to sweat, friction and UV rays. It offers skincare such as face washes and cleansers that focus on oxygen.
Image: courtesy of BUB Inc.
