Hiromi Sakai is a Professor of Chemistry at Nara Medical University, holding dual doctorates in Engineering and Medical Science. His research specializes in artificial blood technology—particularly the development of hemoglobin-loaded vesicles that mimic red blood cells for use in universal transfusions—and in advanced polymer chemistry such as supramolecular and entropy-driven polymerizations. Sakai leads the Sakai Lab in Kashihara, Nara, and is the corresponding author on numerous publications in biomedical chemistry, bridging material science and clinical applications.