Kotaro Sasaki MD, PhD

Associate Professor


Our Mission
The mission of my lab is to advance human reproductive medicine and endocrinology by harnessing the power of stem cells. We are developing self-sustaining miniature versions of the adrenal gland and testis — two major steroid-producing endocrine organs — using human stem cells. Through these models, we aim to uncover how the human endocrine and reproductive systems are built and regulated through the brain–organ connection. Ultimately, we envision these technologies paving the way for new treatments for infertility and adrenal insufficiency.
Our Core Values
  • Autonomy – Think independently and take full responsibility for your work.
  • Discipline – Stay committed and do what needs to be done, even when it’s not easy.
  • Curiosity – Stay playful, ask bold questions, and pursue knowledge relentlessly.
  • Intelligence – Learn aggressively and make sound, well-informed decisions.
  • Collegiality – Collaborate openly, support others, and be a genuine team player.
Scientific Principles
  • Authenticity – Conduct rigorous, transparent, and reproducible research.
  • Originality – Strive to explore ideas that no one else in the world is pursuing.
  • Rationale – Build science on a strong, logical foundation rooted in evidence.
  • Impact – Pursue research that truly advances medicine and benefits humanity.
  • Speed – Science moves fast — stay sharp, decisive, and ahead of the curve.