StemCell Institute Inc. (7096.T) operates as Japan's leading private cord blood bank, specializing in the collection, processing, separation, cryopreservation, and storage of umbilical cord blood and cord tissue cells for regenerative medicine and cell therapy applications; it offers HOPECELL, a unique family banking service that preserves both umbilical cord and cord blood together, providing customers with access to stem cells for potential treatments such as leukemia and cerebral palsy. The company also engages in research and development of stem cell-based medical treatments, blood vessel cell banking, and related investments in regenerative medicine and femtech sectors; its services include ultra-low temperature storage in state-of-the-art cell processing centers in Tokyo and Yokohama, with over 80,000 cord blood units preserved, representing more than 99% market share among private banks in Japan. Founded in 1999 and headquartered in Tokyo at 2F Tokyu Toranomon Building, 1-21-19 Toranomon, Minato-ku, the firm maintains ISO 9001 certification for its facilities and operates as a subsidiary of Nihon Trim Group, a Tokyo Stock Exchange-listed entity, primarily serving expectant families across Japan through nationwide obstetric partnerships. In recent developments, StemCell Institute expanded its processing capabilities with a new Yokohama cell processing center in 2020 for dedicated cord tissue handling; it continues to lead in domestic private bank releases of cord blood units for actual treatments and invests in sustainable growth through strategic alliances in regenerative fields as of 2025.