FLEXKEY and SaunaLium
2026-02-03 03:11:35

FLEXKEY Partners with SaunaLium Koenji to Boost Revenue Using Unutilized Time Slots

FLEXKEY Partners with SaunaLium Koenji



The subscription-based bathing service FLEXKEY, managed by OPTIMIST Co., Ltd. headquartered in Tokyo, has embarked on a partnership with SaunaLium Koenji, a well-regarded sauna facility in the Koenji area. This initiative is designed to optimize off-peak hours and establish a new revenue stream for sauna establishments. SaunaLium Koenji, which presents a unique concept of "Art x Sauna," offers a creative saunascape featuring outdoor baths and wooden saunas, making it particularly appealing to customers.

Addressing Common Challenges


Many sauna and bathing establishments encounter specific challenges, particularly regarding operational hours. Common issues include:
  • - Low customer numbers during weekday afternoons or early mornings, at times when facilities continue to operate.
  • - Poor cost-effectiveness with advertising and social media marketing efforts, often resulting in unbalanced expenditure.
  • - Difficulty in improving profit margins despite investments into customer attraction strategies.

FLEXKEY aims to resolve these issues with a system that brings in revenue without adding operational burdens or costs. The service is setting aside specific slots during less popular hours for its customers. Facilities will receive a fixed monthly contractual payment, regardless of the actual foot traffic, ensuring steady income irrespective of fluctuating customer patterns.

Benefits of FLEXKEY


With the FLEXKEY subscription model, sauna facilities can expect significant advantages, such as:
1. Stable Revenue: Facilities benefit from a guaranteed fixed income every month, independent of customer actual usage.
2. Increased Business Opportunities: The system encourages customer visits during typically underutilized hours, boosting additional sales from food, merchandise, and rentals.
3. Zero Setup Costs: There are no initial investments or ongoing fees, allowing for seamless integration into existing operational frameworks.

Invitation to Partners


Sauna and bathing establishments interested in enhancing their operations can request more information, accompanied by a special offer of case studies from partnered facilities, showcasing potential revenue and profit simulations from FLEXKEY implementation. For further details, an inquiry form is available here: Request for Information.

*Note: Promotions may be subject to changes without notice.

Collaboration Opportunities


FLEXKEY is keen on actively promoting collaborations within the sauna and bathing industry. Media inquiries are welcome and can be directed to [email protected].

What is FLEXKEY?


FLEXKEY offers a subscription service priced at ¥5,900 (tax included: ¥6,490), allowing unlimited access to popular saunas, baths, and super baths throughout the Greater Tokyo area under affiliated facilities. Although new membership registrations are currently halted, a reopening is anticipated around February to March, with a project to limit the number of new subscribers for efficient service delivery. Prospective users should check the official FLEXKEY social media for updates:

By addressing the challenges of utilizing off-peak hours, FLEXKEY's subscription model promotes healthier habits and greater accessibility to high-quality sauna experiences at more affordable rates, in turn benefiting facilities by enhancing underused time slots. The initiative conveys FLEXKEY's vision: “From a luxury to a daily wellness routine.” Through these efforts, FLEXKEY strives to popularize bathing habits among the Japanese population, contributing to the long-term growth of the sauna and bathing industry, thereby supporting overall wellness.

Sample Partner Facilities


  • - PARADISE Mita
  • - Sugoi Sauna Akasaka
  • - Sugoi Sauna & Stay Azabu-Juban
  • - Lion Sauna Shinbashi
  • - Ginger Sauna Kinnokame
  • - Sauna Dojo
  • - Times Spa Resta

With SaunaLium Koenji officially partnering in the initiative, this step signifies the evolution of FLEXKEY, as they claim a growing foothold within the wellness scene across Japan.

For more information on the partnership or general inquiries, visit:


画像1

画像2

画像3

画像4

画像5

画像6

画像7

画像8

画像9

画像10

画像11

画像12

画像13

画像14

画像15

画像16

画像17

画像18

Topics Consumer Products & Retail)

【About Using Articles】

You can freely use the title and article content by linking to the page where the article is posted.
※ Images cannot be used.

【About Links】

Links are free to use.