Highly Popular Sauna Hat Brand "Best Sauna Hat" Collaborates with Three Chuo Line Facilities for Limited Edition "Mesh-kun" Color Release

Messe Property Co., Ltd. (Headquarters: Minato-ku, Tokyo, Representative Director: Shigeru Miyamoto), which promotes next-generation living spaces and hot spring businesses, announces that its hot spring facilities in the Chuo Line area, "ROOFTOP (Nishi-Ogikubo)," "MONSTER WORK & SAUNA (Kichijoji)," and "FLOBA (Mitaka)," will collaborate with the specialized sauna hat brand "Best Sauna Hat" to release the mascot charm "Limited Mesh-kun" in limited quantities starting July 3, 2026 (Fri).

This product is based on Best Sauna Hat's popular mascot "Mesh-kun," with three facility-exclusive colors reflecting the concept and spatial image of each facility. It will be offered as a limited design expressing the individuality of each facility for sauna fans.

Messe Property positions July 3rd as "Reverse Sauna Day" because reading the number "73" backward sounds like "sauna," and holds various events annually. As part of this initiative this year, in addition to the limited charm release in collaboration with Best Sauna Hat, a Tanabata event will also be held jointly by the three facilities.

About the Collaboration with Best Sauna Hat

We have collaborated with Best Sauna Hat more than five times previously. Our collaborative sauna hats sold in the past were well-received, selling out after their release, and we have received many requests from customers for new collaborations.

The "Limited Mesh-kun" being sold this time is based on Best Sauna Hat's popular mascot charm, with facility-exclusive colors reflecting the concept and spatial image of each facility.

All three types will be released, expressing the individuality of ROOFTOP, MONSTER WORK & SAUNA, and FLOBA.

【Sales Overview】

Product Name: Best Sauna Hat x ROOFTOP / MONSTER WORK & SAUNA / FLOBA "Mesh-kun"

Sales Period: July 3, 2026 (Fri) 8:00 AM~ *Limited quantity, sales will end once sold out.

Sales Price: ¥3,800 each (tax included)

Sales Locations: ROOFTOP (Nishi-Ogikubo), MONSTER WORK & SAUNA (Kichijoji), FLOBA (Mitaka) stores

【Lineup】

(From left: ROOFTOP model, MONSTER model, FLOBA model)

1 ROOFTOP Limited Model

A refreshing blue-gray inspired by the sky rooftop sauna. It evokes the "openness of the sky and wind" and "sense of refreshment" of the city.

2 MONSTER WORK & SAUNA Limited Model

An obsidian black body with orange accents, inspired by monsters. The design features stoic immersion and sharp eyes.

3 FLOBA Limited Model

Clean white and green, inspired by a calm space. The colors convey a gentleness that soothes the fatigue of daily life.

About the Tanabata Event

In conjunction with "Reverse Sauna Day" on July 3rd, a joint Tanabata event will be held by the three facilities from July 4th to July 7th. Each facility will implement a tanzaku (wish strip) project where visitors can write their wishes and hang them, as well as offer Aufguss events with different themes for each facility.

Additionally, FLOBA will host a "Starry Sky Sauna" event for Tanabata, allowing visitors to enjoy a fantastical spatial experience.

These events aim to create opportunities for visitors to interact through seasonal festivities, not just to enjoy the sauna.

【Tanabata Event Overview】

Event Period: July 4, 2026 (Sat) – July 7, 2026 (Tue)

Participating Facilities: ROOFTOP / MONSTER WORK & SAUNA / FLOBA

The popular tanzaku event from last year

Common Plans for All Three Facilities

● Tanzaku Project

Visitors will be invited to write their wishes and display them within the facility.

● Aufguss Event

Each facility will offer a unique Aufguss experience with special programs themed around Tanabata and summer.

ROOFTOP Exclusive Plan

● Lantern Outdoor Bathing

Lanterns will be placed in the outdoor bathing area, creating a special space to enjoy the night sky bathed in soft light.

● Tanabata Löyly

A special löyly session using an aroma inspired by Tanabata will be held, offering a moment of mental and physical relaxation with a scent that evokes the arrival of summer.

FLOBA Exclusive Plan

● Starry Sky Sauna

Using interior lighting effects, a fantastical sauna space inspired by the Tanabata night sky will be provided.

Facility Overview

Facility Name: ROOFTOP LifeWork

Location: 4F, 3F, 3-14-7 Nishi-Oginan, Suginami-ku, Tokyo

Business Hours: 8:00 AM – 12:00 AM (Midnight) *Last entry 11:00 PM

Store HP: ROOFTOP (https://rooftopsauna.jp/)

Features an exceptionally open rooftop outdoor bathing area where you can feel the city's sky and wind.

Rooftop outdoor bathing in Tokyo where you can gaze at the sky (ROOFTOP, Nishi-Ogikubo)

Giant sauna room with a capacity of 100 people (MONSTER, Kichijoji)

Facility Name: MONSTER WORK & SAUNA

Location: B1F, 1-8-3 Kichijojihoncho, Musashino-shi, Tokyo

Business Hours: 8:00 AM – 12:00 AM (Midnight) *Last entry 11:00 PM

Store HP: MONSTER WORK & SAUNA (https://monster-ws.jp/)

Features an immersive experience with one of the most powerful heaters and auto-löyly.

Facility Name: FLOBA LifeWork

Location: 2-4F, B1-1F, 3-45-2 Shimo-Renjaku, Mitaka-shi, Tokyo

Business Hours: 8:00 AM – 12:00 AM (Midnight) *Last entry 11:00 PM

Store HP: FLOBA (https://floba-mitaka.jp/)

Features a maintenance experience that harmonizes the body with Japan's top-class high-concentration carbonated spring and a calm atmosphere.

High-concentration carbonated spring in a sophisticated space design (FLOBA, Mitaka)

About "Best Sauna Hat"

Best Sauna Hat is a brand that offers sauna-related items, primarily sauna hats. They develop products that combine functionality and design, using their proprietary high-insulation mesh material.

Official Website: https://bestsoundrecords.net/

"Best Sauna Hat" logo Diverse range of sauna hats offered

Messe Property Co., Ltd.

Messe Property Co., Ltd. proposes "new places" that simultaneously fulfill "work," "rest," and "rejuvenation," and develops next-generation complex facilities primarily in Tokyo for working people and local residents. Through the creation of comfortable spaces and service provision, including the authentic Finnish-style sauna "ROOFTOP," the largest co-working space in Tokyo "LifeWork," the world's largest sauna "MONSTER WORK & SAUNA," and "FLOBA" equipped with Japan's top-class high-concentration carbonated spring, they are working to revitalize local communities and create new value in work, learning, and interaction.

Company Overview

Company Name: Messe Property Co., Ltd.

Location: 3-2-1 Roppongi, Minato-ku, Tokyo

Representative Director: Shigeru Miyamoto

Established: March 19, 2015

Business Activities: Creation of next-generation complex living spaces, entertainment business

Company HP: https://www.p-messe.com/