Marianna University School of Medicine in Tokyo, Japan. He completed his MD in 1998 and PhD in 2004, both at Showa University School of Medicine. Dr. Hasegawa is board certified by the Japan Society of Perinatal and Neonatal Medicine and Japan Society of Ultrasonics in Medicine. He has been awarded the Scientific Award of both the Japan Society for Obstetrics and Gynecology and Japan Society for Reproductive Medicine. He was also named a Best Reviewer for the Journal of Obstetrics and Gynecology Research. His extensive research focuses on ultrasound evaluation of the umbilical cord and placenta, early detection of placental abruption, and ultrasound evaluation in early gestations.