Announcement Regarding Share Acquisition (Subsidiary Company) of aini Co., Ltd.

Tsukui Co., Ltd. (Head Office: Yokohama City, Kanagawa Prefecture, President: Tsuyoshi Takabatake, hereinafter "Tsukui") is pleased to announce that as of April 1, 2026, Tsukui has acquired the shares of aini Co., Ltd. (Head Office: Miyazaki City, Miyazaki Prefecture, President: Toru Kakiuchi, hereinafter "aini") and made it a wholly-owned subsidiary.

Purpose of Share Acquisition aini, established in November 2019, commenced its visiting nursing business in March 2020. The company provides highly specialized visiting nursing services to customers with diverse needs, including those requiring end-of-life care, pediatric care, and mental health support. In particular, for customers undergoing peritoneal dialysis, whose cases are increasing in Miyazaki Prefecture, aini actively works to improve the quality of regional healthcare by enhancing collaboration with nearby visiting nursing stations, in addition to supporting their home life. Furthermore, in January 2026, the company launched a home care support business, establishing a more integrated and seamless home support system by strengthening collaboration with its visiting nursing business.

Through this subsidiary acquisition, Tsukui will maximize aini's strengths and further enhance its services to achieve its mission of "facing the challenges of a super-aged society and creating an era where people can live happily for 100 years."

Overview of aini Co., Ltd. Company Name: aini Co., Ltd. Representative: Toru Kakiuchi, Representative Director Head Office Location: Room 202, Yasukouchi Office, 3326 Otsuka-cho Kubota, Miyazaki City, Miyazaki Prefecture Date of Establishment: November 20, 2019 Business Description: Operation of visiting nursing business and home care support business Website: https://www.aini3326.com/

List of Facilities ● Visiting Nursing Facility Name: Visiting Nursing Station aini Facility Location: Room 202, Yasukouchi Office, 3326 Otsuka-cho Kubota, Miyazaki City, Miyazaki Prefecture Designated Date: March 1, 2020 Number of Employees: 19 Number of Customers: 116

● Home Care Support Facility Name: Care Plan Center Tomori Facility Location: Room 101, 1F, Nagatomo Building, 2768-3 Otsuka-cho Shironoshita, Miyazaki City, Miyazaki Prefecture Designated Date: January 1, 2026 Number of Employees: 1 Number of Customers: 44

Management Structure After Share Acquisition Representative Director and President: Toru Kakiuchi Director: Koji Ishii (concurrently Executive Officer and General Manager of Medical Business Division, Tsukui Co., Ltd.) Director: Naoki Watanabe (concurrently Executive Officer and General Manager of Medical Management Promotion Division, Tsukui Co., Ltd.)