MRSO Inc. MRSO, Inc. (5619.T) develops and operates healthcare platforms focused on preventive medicine and digital transformation in Japan, providing online reservation systems for medical checkups, human dock examinations, cancer screenings, and vaccinations through its flagship MRSO.jp site, which lists the largest number of medical facilities in the country and integrates with T-points; total management systems like MRS Plus for facility availability and efficiency; website design services for medical institutions; Healthcare BPO services supporting over 100,000 cases annually; Health Plus for health insurance societies, occupational health centers, and corporate departments; custom system development leveraging healthcare market expertise; and international medical tourism services including reservations, explanations, interpretation, and result translations. The company serves patients, local governments, medical facilities, health insurance associations, corporations, and residents nationwide, with operations centered in Japan and headquartered at 17F Shiroyama Trust Tower, 4-3-1 Toranomon, Minato-ku, Tokyo 105-6017. Founded in February 2015, MRSO Inc. listed on the Tokyo Stock Exchange Growth Market in December 2023 following a capital and business alliance with SHIFT Inc. for quality assurance and employee health management; recently announced a business partnership with Benefit One Co. on November 14, 2025, to provide WEB reservation services via MRSO.jp for corporate and health insurance clients starting fiscal 2026; and executed share buybacks including 44,200 shares via ToSTNeT-3 in 2024 while updating its MRSO system design.