SOXAI Implements World's First* Heatstroke Alert Function on Smart Ring

SOXAI Inc. (CEO Tatsuhiko Watanabe, hereinafter "SOXAI") has implemented a heatstroke alert function, the first of its kind for a smart ring, in the SOXAI RING app, which works with the SOXAI RING. This function, launched on Friday, June 12, 2026, will also be available to existing SOXAI RING 2* users through an app update. * World's First: As a smart ring equipped with a "heatstroke risk alert function that combines weather data including the Heatstroke Index (WBGT) with biometric data." Based on publicly available information from major manufacturers developing smart rings with vital sensing functions (Source: SOXAI, as of June 10, 2026). * This function is only available on SOXAI RING 2. Please note that it is not available on SOXAI RING 1.1 or earlier models. * This function is only available with firmware version 2.89 or higher. Please update to the latest version within the app before use. * This product is not a medical device. It does not diagnose heatstroke, and the displayed information is for reference purposes only. Overview of the Heatstroke Alert Function This function comprehensively analyzes real-time data including heart rate and skin temperature measured by the SOXAI RING during activity, along with the national Heatstroke Index (WBGT) provided by the Ministry of the Environment. Based on SOXAI's proprietary criteria, referencing the Ministry of Health, Labour and Welfare's "Manual for Heatstroke Prevention Measures in the Workplace*," it detects situations with a high risk of heatstroke and delivers alerts via push notifications. By combining continuous vital data acquisition through 24-hour wear, unique to ring-type devices, with weather data provided by public institutions, it supports heatstroke countermeasures tailored to the user's physical condition. * Source: Ministry of Health, Labour and Welfare, Labour Standards Bureau, Health and Safety Department, Industrial Health Division, "Manual for Heatstroke Prevention Measures in the Workplace" (https://www.mhlw.go.jp/file/06-Seisakujouhou-11200000-Roudoukijunkyoku/manual.pdf) Background of Development According to the Japan Meteorological Agency's three-month forecast, temperatures are expected to be higher than average nationwide this summer, necessitating vigilance against heatstroke. Furthermore, statistics from the Fire and Disaster Management Agency show an increasing trend in emergency transport cases due to heatstroke year by year, making it a serious social issue. While various items have existed to alert people to heatstroke, realizing this function with a ring-type device allows for continuous 24-hour vital data monitoring with minimal burden of wear. Compared to other wearable devices such as smartwatches, it offers higher continuity of wear in daily life, enabling more practical heatstroke countermeasures. Future Initiatives SOXAI will continue to leverage the rich vital data obtained through the SOXAI RING to expand functions that support users' health management. While focusing on sleep management, the company will promote initiatives towards realizing "Healthcare as a Lifestyle," including responses to health risks according to seasons and environments. Father's Day Gift 10% OFF Campaign As the hot season approaches, why not protect the safety of your father or loved ones who are active outdoors, starting from their fingertips? For a limited time from June 12 (Friday) to June 22 (Monday), we are holding a campaign offering a 10% discount on the "SOXAI RING 2." With a message of gratitude for your loved ones, why not gift the SOXAI RING, which supports health, this Father's Day? Campaign Period: Friday, June 12, 2026, 10:00 AM - Monday, June 22, 2026, 10:00 AM Eligible Shops: SOXAI Official Online Store (https://soxai.co.jp/) and participating electronics retailers (*some stores). Special Offer: During the campaign period, all SOXAI RING 2 models will be 10% off when purchased from eligible shops. * Not available on Amazon, SoftBank shops, Docomo shops, or other channels not listed above. Please be aware. * Campaign periods may vary at electronics retailers. Please check in-store price displays. Also, participation is limited to select stores. About SOXAI SOXAI is a health-tech company founded in 2021 with the vision of "Healthcare as a Lifestyle." By applying vital sensing technology to all aspects of life, we aim to realize a world where people can naturally engage in health promotion. https://soxai.co.jp/pages/about-us About "SOXAI RING 2" On December 10, 2025, we launched the "SOXAI RING 2," a new model of our proprietary Japanese-developed sleep management smart ring, "SOXAI RING." The new "SOXAI RING 2" features the newly developed "Deep Sensing™" photoelectric plethysmography (PPG) sensor, utilizing cutting-edge optical technology for which we hold a patent. This has significantly improved measurement accuracy, allowing for visualization of changes in physical condition at a deeper level. Furthermore, with a slim width of 6.7mm and a world-leading continuous usage time of up to 14 days, it offers greater comfort for prolonged wear. For more details, please check here: https://prtimes.jp/main/html/rd/p/000000039.000089024.html * "Spatial resolved spectroscopic multi-wavelength PPG" is patented (Patent No. 7655609). * World's Longest: Comparison based on publicly available information from major smart ring manufacturers developing smart rings with vital sensing functions and a continuous operating time of 4 days or more. The battery installed varies by size; 14 days applies to sizes 20-26. This can vary depending on ring size, usage conditions, firmware version, and battery aging. (Source: SOXAI, as of December 10, 2025). Company Overview Headquarters: 1-2-1 Furocho, Naka-ku, Yokohama, Kanagawa, Chuo Dai 6 Kannaicho Bldg. 1102 Representative: Tatsuhiko Watanabe, Representative Director Capital: ¥100,000,000 Established: 2021 Media Inquiries: SOXAI Inc. Atsuki Mitsuyori, Director, Vice President, CFO Phone: 045-264-9397 Email: atatsuki.mitsuyori@soxai.co.jp Keywords: