Yujiro Yamanaka

Dr. Yujiro Yamanaka serves as Associate Professor at Hokkaido University's Graduate School of Education and holds a Visiting Researcher position at the University of Groningen. Holding a Doctor of Medicine degree from Hokkaido University, his career spans key roles in chronobiology research since 2008.

• 2016-present: Core Faculty, Brain Science Research and Education Center
• 2010-2016: Assistant Professor, Graduate School of Medicine
• 2008-2010: Postdoctoral Researcher

His research focuses on human circadian systems through interdisciplinary lenses:

• Chronobiology: Dual oscillator models, rhythm entrainment
• Sleep Science: Light-dark cycle impacts, temporal isolation
• Sports Physiology: Exercise timing effects on circadian clocks
• Nutritional Chronobiology: Meal timing and glucose metabolism
• Environmental Physiology: Lighting conditions and wearable devices

Recent publications (2022-2025) demonstrate expertise in melatonin modulation, nonphotic entrainment, and time-sensitive physiological responses. Collaborations span microbiology, exercise science, and public health domains.

Awarded multiple times for both research and teaching excellence, including:

• 3× Excellent Teacher Awards (2021-2023)
• 2017 COI2021 Special Award
• 2014 Academic Encouragement Award (Chronobiology Society)

His work extends to public engagement through media appearances and patent development of light irradiation devices, bridging laboratory research to real-world health applications.