HIRAMATSU Ryuji

HIRAMATSU Ryuji serves as an Associate Professor at the Graduate School of Agricultural and Life Sciences, University of Tokyo, specializing in reproductive and developmental biology with emphasis on mammalian systems.

His core research investigates:

• Testis development mechanisms including luminal flow dynamics and Sertoli barrier function
• SOX17 gene roles in endoderm development, gallbladder formation, and biliary atresia
• Fetal testis development robustness and sexual differentiation pathways
• Organ culture techniques for reproductive tissues using mouse and human models

His work bridges veterinary science, genetics, and regenerative medicine through advanced imaging and molecular analysis.

Dr. Hiramatsu actively leads multiple Japan Society for the Promotion of Science (JSPS) grants including Principal Investigator roles for 'Analysis of mechanism maintaining sexually robustness in mammalian fetal testis development' (2020-2022) and 'Establishment of novel morphological atlas of mouse embryonic development' (2017-2019), while contributing as Co-Investigator on projects spanning testis transplantation systems (2025-2026) and SOX17 functional diversification studies (2024-2028).