New Model of Japan's Sleep Management Smart Ring 'SOXAI RING', the 'SOXAI RING 2', Available at Docomo Shops Nationwide Starting March 24

The new model of the Japanese-developed sleep management smart ring 'SOXAI RING', called the 'SOXAI RING 2' and created by SOXAI Inc. (Representative Director and President: Tatsuhiko Watanabe; hereafter, SOXAI), became available at Docomo shops nationwide starting Tuesday, March 24, 2026. Additionally, information regarding this product became available on the same day at participating stores operated by Showa Nishikawa Co., Ltd. (hereafter, Showa Nishikawa).*1

Coinciding with the start of product availability, sizing kits are now available for use at all Docomo shops nationwide. Please try them on your preferred finger, excluding the thumb, to check the sizing and comfort.

*1 As of Tuesday, March 24, 2026, the handling of 'SOXAI RING 1.1' will end, and customers will be able to purchase the 'SOXAI RING 2' from the Docomo Online Shop by scanning the QR Code® provided on leaflets distributed in stores.

Retail Price

* Prices are for purchases made via the Docomo Online Shop.

* Please note that prices are subject to change without notice.

Sales Channels

• Docomo Shops nationwide
• Docomo Online Shop
• d Shopping® Direct
• Hikari TV Shopping Rakuten Ichiba Store
• Hikari TV Shopping Yahoo! Shopping Store
• Showa Nishikawa (Gotemba Premium Outlets, Mitsui Outlet Park Kisarazu, and Karuizawa Prince Shopping Plaza stores)

Features of 'SOXAI RING 2'

1. World's thinnest*2 with a light, natural feel

This is one of the world's smallest*2 health management smart rings, measuring approximately 6.7mm wide, 2.7mm thick, and weighing about 2g, minimizing stress on sleep caused by wearing it. Furthermore, its perfect circular shape, free of bumps or imbalances, makes you forget you are wearing it, reducing wearing stress.

2. Battery life up to 14 days*3, recording sleep changes continuously

Battery performance has significantly evolved; while the previous model 'SOXAI RING 1.1' lasted up to 9 days, this product achieves up to 14 days of continuous use. It monitors your health 24 hours a day without the hassle of frequent charging.

3. World-class*4 accurate sleep measurement with 'Deep Sensing™' optical sensor

Starting with this product, we have newly equipped the 'Deep Sensing™' photoplethysmography (PPG) sensor, independently developed and patented by SOXAI. This dramatically improves the measurement accuracy of heart rate, blood oxygen levels, and skin temperature, enabling more accurate visualization of physical conditions, such as signs of sleep apnea. Based on the latest sleep science trends, our scoring logic calculates sleep scores tailored to the user's actual sleep based on 7 indicators, such as sleep duration and sleep efficiency. It visualizes Quality of Life (QoL) by measuring scores in three categories—'Sleep', 'Physical Condition', and 'Exercise'—and the AI provides lifestyle improvement advice customized to the user to support health promotion.

4. A safe and reliable Japanese-made smart ring

High quality is achieved by conducting everything from design to manufacturing, inspection, and data management domestically. It features IP68-equivalent/100m waterproof performance, and the surface is treated with CITIZEN WATCH CO., LTD.'s 'DURATECT®' surface hardening technology, allowing it to be worn 24 hours a day without stress.

*2 Comparison based on publicly available information from major smart ring manufacturers developing 'smart rings with vital sensing functions and continuous battery life of 4 days or more' (As of December 10, 2025; surveyed by SOXAI).

*3 Comparison based on publicly available information from major smart ring manufacturers developing 'smart rings with vital sensing functions and continuous battery life of 4 days or more'. The battery installed varies by size; 14 days is for sizes 20-26. It varies depending on ring size, usage, firmware version, and battery aging (As of December 10, 2025; surveyed by SOXAI).

*4 Comparison of the presence and number of spatial resolution multi-wavelength PPG components among 'major smart ring brands equipped with vital sensing functions' (As of December 2025; surveyed by SOXAI).

* 'DURATECT' is a registered trademark of CITIZEN WATCH CO., LTD.

* 'QR Code' is a registered trademark of DENSO WAVE INCORPORATED.

About 'SOXAI RING 2'

On December 10, 2025, we launched the 'SOXAI RING 2', a new model of the Japanese-developed sleep management smart ring 'SOXAI RING' that we develop and sell ourselves. The new 'SOXAI RING 2' is newly equipped with the 'Deep Sensing™' photoplethysmography (PPG) sensor, which was independently developed using cutting-edge patented optical technology. This has significantly improved measurement accuracy, allowing for the visualization of changes in physical condition at a deeper level. Additionally, its size is the world's thinnest at 6.7mm wide, and its continuous usage time has reached one of the world's longest levels at up to 14 days, making it even more comfortable for long-term wear.

About SOXAI

SOXAI is a health-tech company founded in 2021 with the vision of 'Making healthcare a lifestyle'. By applying vital sensing technology to all aspects of daily life, we aim to realize a world where people can naturally engage in health promotion.

Company Overview

Headquarters: 1-2-1 Furo-cho, Naka-ku, Yokohama, Kanagawa Prefecture

Representative: Tatsuhiko Watanabe, Representative Director

Established: 2021

Contact for Press Inquiries regarding this Press Release

SOXAI Inc.

Atsuki Mitsuyori, Director and CFO

Phone: 045-264-9397

Email: info@soxai.co.jp