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Leading Specialists in Japan
Reproductive specialists in Japan
Dr. Riko Konno
Doctor of Medicine
Dr. Riko Konno is an adjunct physician at Kato Ladies Clinic in Shinjuku, Tokyo, and a member of its minimal-stimulation and natural-cycle IVF team. She graduated from the University of the Ryukyus School of Medicine in 2019, trained at Aokei Central General Hospital and the Japanese Red Cross Medical Center, and joined KLC in 2024.
Japan 
Dr. Ryosuke Akino
Doctor of Medicine
Dr. Ryosuke Akino is an adjunct physician at Kato Ladies Clinic in Shinjuku, Tokyo, on its minimal-stimulation and natural-cycle IVF team. A Showa University graduate with experience at the National Center for Child Health and Development, he holds JSOG specialist and instructor certification and endoscopic surgery accreditation, and returned to KLC in 2025.
Japan 
Dr. Sachie Onogi
Doctor of Medicine
Dr. Sachie Onogi is an adjunct physician at Kato Ladies Clinic in Shinjuku, Tokyo, on its minimal-stimulation and natural-cycle IVF team since 2018. After a science degree at Osaka University and medical training at Okayama University, she completed the obstetrics residency ladder at St. Luke's International Hospital and holds certifications in reproductive medicine and women's health.
Japan 
Machiko Sameshima
Senior Embryologist
Machiko Sameshima is the senior embryologist at Hanaoka IVF Clinic (Shinagawa), a core member of the culture room team handling embryo culture, vitrification and laboratory quality. She qualified to work with oocytes through the clinic's rigorous daily-training and competency-assessment system.
Japan 
Satoru Takamizawa
Vice Director of Sugiyama Ob-Gyn Clinic Shinjuku
Dr. Satoru Takamizawa is Vice Director of Sugiyama Ob-Gyn Clinic Shinjuku, with 36 years as a physician and 26 in reproductive medicine. A former university professor, he specializes in ART, hysteroscopic surgery, PRP therapy, recurrent pregnancy loss and onco-fertility preservation, with a data-driven treatment style.
Japan 
Dr. Satoshi Tsuchiyama
Doctor of Medicine
Dr. Satoshi Tsuchiyama is Medical Director at Kato Ladies Clinic in Shinjuku, Tokyo, appointed in 2023. A Kanazawa University graduate trained in the Tokyo Women's Medical University obstetrics and gynecology system, he has spent his career across Japan's leading fertility clinics and is a certified instructor and specialist in reproductive medicine with strengths in IVF, ICSI and male-factor infertility.
Japan 
Shunsuke Ishiyama
Obstetrician and Gynecologist
Dr. Shunsuke Ishiyama is a reproductive medicine physician at Sugiyama Ob-Gyn Clinic Shinjuku with 17 years of clinical experience and 8 years in fertility treatment, focusing on recurrent implantation failure, chronic endometritis, ovulation induction, PGT-A and supplement counseling.
Japan 
Dr. Sayuki Taguchi
Reproductive Medicine Specialist & Instructor
Dr. Sayuki Taguchi is a reproductive medicine instructor and certified clinical genetic specialist at Oak Clinic, researching antisperm-antibody infertility for over 20 years. Her doctoral work on antisperm autoantibodies underpins immune-infertility diagnosis and genetic counseling.
Japan 
Dr. Akitsugu Kokiguchi
Doctor of Medicine (PhD, Okayama University)
Dr. Akitsugu Kokiguchi is director of Hanabusa Women's Clinic's Sannomiya main hospital in Kobe. An Okayama University MD-PhD, he holds one of Japan's leading case records in FT tubal cannulation and won the 2009 Hyogo OB-GYN Society prize.
Japan 
Takashi Horikawa
Director of Reproductive Medicine, Shinjuku Clinic
Dr. Takashi Horikawa is Director of Reproductive Medicine at Sugiyama Ob-Gyn Clinic Shinjuku. With 26 years of clinical practice, 24 years in fertility care and over 20,000 egg retrievals, he specializes in mild-stimulation and natural-cycle IVF and anesthesia-free retrieval.
Japan 
Dr. Takashi Okuno
Doctor of Medicine
Dr. Takashi Okuno is an adjunct physician at Kato Ladies Clinic in Shinjuku, Tokyo, and formerly the clinic's deputy director (2013). A 1989 Miyazaki Medical College graduate trained in the Yamanashi Medical University obstetrics and gynecology department, he has worked with KLC since 1996 across three decades of Japanese IVF practice.
Japan 
Dr. Saemi Takashina
Doctor of Medicine
Dr. Saemi Takashina is an adjunct physician at Kato Ladies Clinic in Shinjuku, Tokyo, who joined its minimal-stimulation and natural-cycle IVF team in 2026. A University of Tsukuba medical graduate, she trained across several Tokyo and Ibaraki hospitals, including Aikido Hospital and Showa University Hospital, before specializing in fertility care.
Japan Showing 61-71 of 85
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