'%20transform='translate(88%20-32)'%3e%3cpath%20fill='%23fff'%20d='M-128%2032h720v480h-720z'/%3e%3ccircle%20cx='523.1'%20cy='344.1'%20r='194.9'%20fill='%23bc002d'%20transform='translate(-168.4%208.6)scale(.76554)'/%3e%3c/g%3e%3c/svg%3e)
Leading Specialists in Japan
Reproductive specialists in Japan
Kaori Nakase
MD (Doctor of Medicine)
Reproductive medicine physician at Kato Ladies Clinic since 2019, double-certified in OB/GYN and reproductive medicine, with perinatal center experience.
Japan 
Dr. Giannina Karangos
Reproductive Medicine Specialist
Dr. Giannina Karangos is the medical director of Oak Clinic Ginza since April 2025. Trained at Hyogo College of Medicine's graduate school with a Peruvian medical degree, she researches reproductive immunology and gonadotropin protocols, and consults in Japanese and English.
Japan 
Kazuki Nakao
Reproductive Medicine Specialist
Dr. Kazuki Nakao is a reproductive medicine physician at Sugiyama Ob-Gyn Clinic Shinjuku with 25 years as a physician and 20 in fertility care. He covers ovulation induction, IVF, egg freezing, recurrent implantation failure, recurrent pregnancy loss, hysteroscopy, PGT-A, endometritis and low AMH, with a data-first, explanation-driven consultation style.
Japan 
Kazumi Takeshima
MD (Doctor of Medicine)
Fertility physician at Kato Ladies Clinic since 2019, formerly an instructor at Yokohama City University's reproductive medicine center.
Japan 
Keiichi Kato
MD (Doctor of Medicine)
Director of Kato Ladies Clinic since 2013; board-certified in OB/GYN, reproductive medicine and clinical genetics; a leader of minimal-stimulation IVF.
Japan 
Keiji Morimoto
MD, PhD
Kato Ladies Clinic fertility physician and Jikei University OB/GYN lecturer, certified in obstetrics, perinatology and clinical training supervision.
Japan 
Keiko Wada
MD, PhD
Clinical Director at Kato Ladies Clinic with a medical PhD and NIH research training, and 15+ years in KLC's minimal-stimulation IVF program.
Japan 
Keisuke Shiobara
Reproductive Medicine Specialist
Dr. Keisuke Shiobara is a reproductive medicine physician at Sugiyama Ob-Gyn Clinic Shinjuku, covering general infertility treatment and IVF with a logical, evidence-based and fast-paced consulting style. A Keio University graduate with 10 years as a physician, he is one of the clinic's approachable younger specialists.
Japan 
Dr. Jo Kitawaki
Professor Emeritus, Kyoto Prefectural University of Medicine
Dr. Jo Kitawaki is a reproductive endocrinology authority and Professor Emeritus of Kyoto Prefectural University of Medicine, where he served as professor and hospital president. He focuses on endometriosis-related infertility, reproductive surgery and complex IVF cases.
Japan 
Koji Nakagawa
Director of Sugiyama Ob-Gyn Clinic Shinjuku
Dr. Koji Nakagawa is Director of Sugiyama Ob-Gyn Clinic Shinjuku with 35 years as a physician and 29 years in reproductive medicine. A fellow of the American Society for Reproductive Immunology, he focuses on recurrent implantation failure, recurrent pregnancy loss, immune-based treatment, ovulation induction and PGT-A.
Japan 
Mari Takamiya
Board Certified Obstetrician and Gynecologist
Dr. Mari Takamiya is a reproductive medicine physician at Sugiyama Ob-Gyn Clinic Shinjuku, covering general infertility, ovulation induction, IVF and low AMH care. Trained at Saga University and the Japanese Red Cross Medical Center, she is known for laying out the pros and cons of every treatment option in plain language.
Japan 
Masafumi Segawa
MD (Doctor of Medicine)
Obstetrician and gynecologist at Kato Ladies Clinic since 2025, trained through the Juntendo University hospital network and JSOG-certified specialist.
Japan Showing 37-47 of 85
Ready to start your fertility journey?
Get a personalized plan from our medical advisors