Sakai Seikotsuin Group Invited to Jiangsu Zhongyuan Group's Advanced Medical Facilities in China to Discuss Potential Collaboration in Global Healthcare

Ryuji Baba, President and CEO of rYojbaba Co., Ltd. (Nasdaq: RYOJ), Engages in Strategic Discussions with Senior Executives from China's Largest Medical Group Regarding Future Business Collaboration

The Sakai Seikotsuin Group, together with its parent company rYojbaba Co., Ltd. (Nasdaq: RYOJ), has been invited by Jiangsu Zhongyuan Group to visit its advanced medical institutions and affiliated facilities located in Nanjing and Hangzhou, China. The visit was conducted under the leadership of Ryuji Baba, President and CEO of rYojbaba Co., Ltd.

Given that this visit involved discussions between a Nasdaq-listed company and one of China’s leading healthcare groups, key meetings and on-site reception arrangements were coordinated directly by senior management and executives from Jiangsu Zhongyuan Group. Mr. Fu Qiang, an advisor with extensive international business experience, served as interpreter and strategic advisor during core discussions, while Ms. Chen Shumei from the Overseas Business Center provided on-site interpretation and operational support.

Left: Fu Qiang (President, Japan Kyushu Overseas Chinese Youth Association); Right: Ryuji Baba (President and CEO, rYojbaba Co., Ltd.)

Site Visits to Advanced Medical Facilities in Nanjing and Hangzhou, China; Exchange of Expertise on Medical DX and Health Services

During the visit, the delegation observed cutting-edge initiatives in aesthetic medicine, digital healthcare services, and health management in China. Both parties exchanged views on future development and potential collaboration opportunities in the Japan-China healthcare sector.

Photo: Deng Yanwei (Director, Office of Chairman, Jiangsu Zhongyuan Group) (left), Chen Shumei (Japanese Business Assistant, Overseas Development Center) (right)

Inspection of State-of-the-Art Medical DX and Patient-Centered Services

Facilities visited included Nanjing Hexi Aesthetic Hospital, Hangzhou Yunxi Aesthetic Hospital, and Hexi Grand Health Center. The group received detailed briefings on advanced medical environments utilizing the latest equipment, digital technology-driven operational systems, and patient-centered service models.

In addition to facility tours, active discussions were held with specialized staff across various departments on topics including improvement of medical service quality, talent development, and digital transformation. This provided valuable insights for the Sakai Seikotsuin Group, which operates orthopedic clinics across Japan.

Receiving an overview of Jiangsu Zhongyuan Group’s operations

About Jiangsu Zhongyuan Group

Jiangsu Zhongyuan Group is a platform-type enterprise headquartered in China, with consumer healthcare services as its core business.

The group focuses on building standardized medical operations, implementing digital technologies for management, establishing talent development systems, and enhancing medical service quality, all aimed at delivering sustainable healthcare solutions.

Currently employing over 1,000 staff members, the group primarily focuses on aesthetic medicine while expanding into health management, sports rehabilitation, and digital technology—creating an integrated healthcare platform that combines medicine and technology to meet diverse and evolving needs.

By leveraging the latest digital solutions and efficient operational know-how, the group continuously improves the operational efficiency and service quality of its medical institutions. As a company committed to improving public health and quality of life, Jiangsu Zhongyuan Group is actively expanding beyond China into global markets.

Left to right: Yu Chao (Director, Overseas Business Development Center, Jiangsu Zhongyuan Group), Dai Xiaofeng (Vice President, Jiangsu Zhongy an Group), Bao Henghao (Vice President, Jiangsu Zhongyuan Group), Hiroyuki Oishi (CFO/ Director, rYojbaba Co., Ltd.), Junichi Watanabe (President and CEO, Sakai Seikotsuin Nishi Co., Ltd.), Sohro Shimamura (Auditor, rYojbaba Co., Ltd.)

Future Outlook for the Sakai Seikotsuin Group

The Sakai Seikotsuin Group is committed to contributing to local healthcare and extending healthy lifespans. Beyond domestic operations in Japan, the group actively incorporates advanced medical and health service practices through international exchanges.

The knowledge gained from this visit will be applied to enhance service quality and explore new healthcare initiatives. The group will continue building international partnerships to contribute to improving public health on a broader scale.

It should be noted that this visit was conducted at the invitation of Jiangsu Zhongyuan Group for facility inspection and discussion of potential future collaboration. No formal business or capital alliances have been finalized at this time.

Further updates will be provided promptly should any developments occur.

Left: Junichi Watanabe (President and CEO, Sakai Seikotsuin Nishi Co., Ltd.); Right: Dai Xiaofeng (Vice President, Jiangsu Zhongyuan Group)

Company Overview

Welcome message displayed on Nasdaq Tower

rYojbaba Co., Ltd.

Stock Code/Ticker: RYOJ (Listed on Nasdaq MarketSite)

Founded: 2015

Headquarters: 4-3-1 Ohashi, Minami-ku, Fukuoka City, Fukuoka Prefecture, Japan

Representative: Ryuji Baba, President and CEO

Number of Employees: 311 (as of May 31, 2026)

Business Activities:

• Labor consulting services (labor compliance, IPO consulting, labor risk management, etc.)

• Health services (operation of orthopedic clinics, beauty salons, etc.)

rYojbaba Co., Ltd. Official Website: https://www.ryojbaba.co.jp

Photo of Ryuji Baba at the IPO bell-ringing ceremony held on May 26, 2026

Ryuji Baba, President and CEO of rYojbaba Co., Ltd., displayed on Nasdaq Tower

Shares of rYojbaba Co., Ltd. are confirmed to be tradable on Nasdaq MarketSite via moomoo Securities. Availability through other brokerage firms may expand in the future.

This announcement is for informational purposes only and does not constitute a recommendation or referral to use any specific securities firm. rYojbaba Co., Ltd. does not engage in brokerage activities or investment solicitation. Final decisions regarding stock transactions should be made solely at the investor’s own discretion and responsibility.

moomoo Securities: https://www.moomoo.com/jp

Ryuji Baba, President and CEO, rYojbaba Co., Ltd.

In today’s Japan, challenges such as inflation, currency fluctuations, and labor shortages are increasingly evident. Leveraging its accumulated expertise, the company is well-positioned to provide tailored support in IPO consulting and business divestitures according to client needs. We welcome your inquiries.

Contact Information

E-mail: info@ryojbaba.co.jp

※ For inquiries regarding our highly rated consulting services, please contact the above address.

Sakai Seikotsuin Group

Exterior view of Sakai Seikotsuin Group clinics

The Sakai Seikotsuin Group operates approximately 30 clinics across Kyushu, Hiroshima Prefecture, and Tokyo, centered in Fukuoka Prefecture, with a 40-year history in orthopedic care. While preserving traditional techniques, the group integrates Western medical knowledge with Eastern healing practices to deliver personalized treatments.

The group’s mission is to detect health imbalances that may impact life expectancy through its proprietary methodology. Conditions such as shoulder stiffness and lower back pain are often perceived as non-life-threatening, but they may actually be warning signs of internal organ dysfunction rather than mere muscle fatigue.

The group also employs specialized staff for traffic accident injuries, offering treatments based not only on medical science but also on physics, as physical impacts vary depending on the nature of the accident. Drawing on extensive clinical experience, the group prioritizes treatments that prevent delayed-onset pain and provides comprehensive support in dealing with insurance companies.

Individuals with physical discomfort are encouraged to visit the Sakai Seikotsuin Group—the national healthcare access point staffed by specialists with professional expertise.

Founded: 1989

Representative: Junichi Watanabe, President and CEO

Business: Operation of orthopedic and acupuncture clinics

Features: A core medical pillar of the rYojbaba Group, delivering community-based care for over 35 years

Sakai Seikotsuin Co., Ltd. Official Website: https://fukuoka-seikotsuin.com/ Sakai Seikotsuin Group Locations on Google Maps: https://maps.app.goo.gl/Ae7pFdv5jaLMnxfi9 Sakai Seikotsuin Job Openings: https://recruit.sakai-seikotsuin.jp/

Junichi Watanabe, President and CEO, Sakai Seikotsuin Nishi Co., Ltd.

Medical Trainer Activities

The Sakai Seikotsuin Group actively participates in local sports events with certified judo therapists and acupuncturists serving as medical support trainers for athletes.

The group also values communication with community members, including coaches and family members of athletes, to address their physical concerns.

The group has established a Certified Medical Trainer Program, a qualification awarded only to staff who meet the company’s standards in knowledge, technical skill, and ethics. Regular training sessions are conducted to ensure continuous professional development.

Ambassadorships and International Achievements

• Cambodia Premier Football Club "Soltilo Angkor FC," where former Japanese national team player Keisuke Honda served as de facto owner Article: https://prtimes.jp/main/html/rd/p/000000026.000045278.html

• Yumeaki Yoshinaga, player for KRC Genk (Hench), Belgium’s top-tier football league Article: https://prtimes.jp/main/html/rd/p/000000342.000045278.html

• Former Japanese national team player Seiji Koga Article: https://prtimes.jp/main/html/rd/p/000000012.000045278.html

• Former Nadeshiko Japan (women’s national team) player Mayu Ikejiri Article: https://prtimes.jp/main/html/rd/p/000000014.000045278.html

• Chinatsu Ichi, bronze medalist at the Japanese National Track and Field Championships Article: https://prtimes.jp/main/html/rd/p/000000275.000045278.html

• Official Trainer for the 2025 Taipei Wake Open Article: https://prtimes.jp/main/html/rd/p/000000325.000045278.html

• SP Dialogue with Coaches from Aomori Yamada and Tokai University Fukuoka Article: https://prtimes.jp/main/html/rd/p/000000198.000045278.html

Medical trainer administering treatment

Medical Collaboration

The Sakai Seikotsuin Group maintains collaborative relationships with other medical institutions, enabling seamless referrals or transfers should internal organ issues or other complex conditions be detected.

The group has established a medical collaboration with Notame Matsuoka Clinic. When conditions exceed the scope of orthopedic treatment or when combined treatment at both the clinic and Sakai Seikotsuin would enhance therapeutic outcomes, patients are referred between institutions with full explanation and consent. This ensures safe and comprehensive care.

In addition to injury recovery and pain relief, the group also provides exercise guidance and training advice. Those experiencing physical discomfort are welcome to consult without hesitation.

Notame Matsuoka Clinic Website: https://notame-cl.com/index.html

Dr. Nobuhide Matsuoka, Director, Notame Matsuoka Clinic

Kokusei Union – Laborers’ Ally: https://globalunion-grp.org/mikata/u/kokuzeiunion/

Sakai Seikotsuin / Orthopedic Clinic / Chiropractic / Sports / Trainer / Labor Consulting / Shoulder Stiffness / Lower Back Pain / Headache / Rounded Shoulders / Pelvic Correction / Traffic Accidents / Judo Therapists / Acupuncturists / Recruitment / Job Openings / Soccer / Keisuke Honda / Genk / Hench / Yumeaki Yoshinaga / Aomori Yamada / Kuroda Go / Jiangsu Zhongyuan Group / China / Nanjing / Hangzhou /