The "Sa to Su" Project, a Collaboration Between "Pokémon Sleep" and "Sauna Ikitai," Kicks Off! A Campaign to Win Original Sauna Hats Also Underway.

Pokémon Sleep, a sleep app by Pokémon Inc. and Sauna Ikitai, one of the largest sauna search services in Japan, have collaborated to launch a project called " Sa to Su" to investigate the relationship between sauna warming and sleep from Tuesday, August 19, 2025!

A new project to study the relationship between "totonou" and sleep has started!

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The relationship between the relaxing " totonou " feeling one gets after a sauna and the quality of sleep has been attracting increasing attention in recent years. In this "Sa to Su" project, data is collected through a combination of survey responses, sauna activity postings, and sleep measurement using Pokémon Sleep. We will explore how this data will affect the daily lives of users.

In addition, participants who meet certain criteria will be entered into a drawing for an original, not-for-sale sauna hat. The following is how to participate in the campaign.

• Answer the "Sauna Survey" form.
• Post on "Sauna Ikitai" when you use the sauna.
• Measure your sleep with Pokémon Sleep for more than 10 days

The "Sa to Su" project, in which users can enjoy both sauna and sleep while cooperating in providing data, is expected to be a learning experience for users as well. Just by recording your daily sauna activity and sleep, you will have a chance to review your physical condition. The sauna hats that can be won by lottery are also very special. Please participate during the period and get both the healthy habit and the gift. For more information on this project, check out the official Pokémon Sleep website and theofficial Sauna Ikitai website!