#Japan #Tokyo #Makuake #FLEXKEY #Sauna Subscription

FLEXKEY: Revolutionizing Sauna Access with Subscriptions

In a move to make sauna experiences more accessible and affordable, OPTIMIST Co., Ltd. has officially announced the launch of their innovative service, FLEXKEY. Starting November 5, 2025, early access memberships will be available through the popular crowdfunding platform, Makuake, offering up to 37% off for a limited period. This unprecedented service is going to allow enthusiasts to enjoy unlimited daily visits to a selected range of sauna and bathing facilities for a fixed monthly fee.

How FLEXKEY Works

FLEXKEY provides an attractive solution for sauna lovers who wish to incorporate these relaxing retreats into their daily routines. Users will pay a monthly fee of 4,980 yen (excluding tax) and can visit various partnered facilities at designated off-peak hours once per day for up to 90 minutes. This model not only maximizes participant enjoyment but also ensures facilities benefit from enhanced revenue during quieter periods.

Exclusive Early Access Offers

On Makuake, which is one of Japan's largest crowdfunding platforms, various tiers of funding are available, ranging from sample one-month plans to a limited annual plan that offers the maximum discount. This ensures that individuals, as well as corporations, have the opportunity to benefit from this cost-effective sauna subscription model. The initial campaign period runs from November 5 to December 15, 2025, inviting early adopters to seize these special offers for an incredible 41-day period.

Participating Sauna Facilities

The beauty of FLEXKEY is in its rich assortment of partner saunas. Users can look forward to visiting recognized facilities during different days and times, helping to accommodate diverse schedules while ensuring a premium sauna experience. Some highlighted facilities include:

• - PARADISE Mita (Minato City, Tokyo): 24-hour access except during cleaning hours, available for FLEXKEY usage on weekdays from 9:00 AM to 3:00 PM.
• - Lion Sauna Shimbashi (Minato City, Tokyo): Open from 12:00 PM to the next day’s 10 AM, with FLEXKEY hours from 12 PM to 7 PM on weekdays and from 7 PM to 10 PM on weekends.
• - Amazing Sauna Akasaka (Minato City, Tokyo): Flexible hours, allowing use typically between 11 AM and 3 PM on weekdays.
• - Ginger Sauna Kin no Kame (Minato City, Tokyo): Open daily from 9 AM to 11:30 PM with specific timings designated for women.
• - Sauna Dojo (Shibuya, Tokyo): Open 24 hours, accessibility from 9 AM to 4:30 PM on weekdays.

This varied selection, along with more facilities being added, promises a wealth of options for FLEXKEY users.

Cost-Effective Subscription Model

With a low monthly price, FLEXKEY offers incredible value. Just attending twice a month allows members to recoup their costs, while daily visits lower the effective per-visit cost to a mere 166 yen! This model significantly relieves the financial burden often associated with frequent sauna usage.

User-Friendly Experience

Emphasizing simplicity, FLEXKEY’s subscription service has been designed to be straightforward and user-friendly. Users can enjoy unlimited visits — without complicated rules or bothersome point systems. It's an easy-to-navigate subscription model that prioritizes the customer experience, ensuring everyone can integrate sauna visits effortlessly into their lives.

Supported by Trusted Partners

FLEXKEY is not just a standalone project; it receives support from various media and companies within the bathing and sauna industry, primarily through the media platform SpaWorks. This collaboration enhances the service credibility, further assuring users of a positive and supportive sauna experience ahead.

For the latest updates, follow FLEXKEY on Instagram or visit the official website here.

As the launch date approaches, excitement is in the air, beckoning anyone looking to enrich their leisure routine with the soothing comfort of sauna. Don't miss your chance to grab these early-bird offers before they're gone!