Hiromitsu Nakauchi

Professor

Dr. Hiromitsu Nakauchi is a world-renowned leader in stem cell biology whose lifelong research aims to understand and harness the regenerative capacity of cells to extend human healthspan and longevity. His pioneering work bridges fundamental discoveries in hematopoietic and pluripotent stem cells with transformative applications in immune rejuvenation, organ regeneration, and cell-based therapy.
During his postdoctoral training with the late Prof. Leonard Herzenberg at Stanford, Dr. Nakauchi made a landmark discovery by isolating the CD8 gene, a key molecule in T-cell immunity. Upon returning to Japan, he redirected his focus to hematopoietic stem cells (HSCs)—the origin of all blood and immune cells—and developed methods to purify and clonally isolate single HSCs. He demonstrated that a single HSC can reconstitute the entire hematopoietic system, laying the foundation for functional analysis of stem cells at the single-cell level.
Building on these insights, Dr. Nakauchi returned to Stanford University in 2014 as a faculty member, where his laboratory developed a method to expand functional HSCs ex vivo. This advancement enables safer HSC transplantation, efficient genome editing, and rejuvenation of aged stem cells, thereby providing a platform to restore blood and immune function. This discovery has profound implications for treating age-related hematopoietic decline and advancing stem cell–based rejuvenation therapies.
Dr. Nakauchi also leads innovations in induced pluripotent stem cell (iPSC) technology, generating functional blood and immune cells in vitro. His team developed iPSC-derived rejuvenated antigen-specific T cells (rejT cells), offering new therapeutic avenues for viral infections and cancer immunotherapy—both critical for healthy aging and immune resilience.
Extending his vision beyond the cellular level, Dr. Nakauchi introduced the concept of the “organ niche,” demonstrating that functional organs can be generated across species—for example, a rat pancreas in a mouse and a mouse pancreas in a rat—thereby realizing the concept of exogenic organogenesis. This breakthrough points to a future where organ failure may be treated with organs generated from a patient’s own stem cells, enabling rejection-free transplantation.
Through these achievements, Dr. Nakauchi’s research continues to illuminate how stem cell rejuvenation, immune regeneration, and organ engineering can together transform human longevity and redefine the boundaries of regenerative medicine.