Doctor's Profiles

Kawasaki Medical University Graduate, Graduate School of Medical Research of Hyogo College of Medicine Graduate.
Her specialty is “Infertility from the anti-sperm antibody”.
Her thesis was the Identification and Characterization of a sperm Peptide Antigen Recognized By a Monoclonal Antisperm Autoantibody Derived from a Vasectomized Mouse.(Journal: Biochemical and Biophysical Research Communications.)
After Fuchu Hospital, she began her work for Oak Clinic.
In regards to In Vitro Fertilization, she believes that it is important to build a treatment strategy including an ovulation induction method, and she is really pouring her strength into deciding the policy based on the condition of each individual.

Japanese Society of Reproductive Medicine Reproductive Medicine Specialist / Instructor
Japanese Society of Obstetrics and Gynecology Specialist Physician.Clinical Geneticist.
Maternal Protection Act Designated Doctor.

Subspecialty：Counseling / genetic diagnosis

University of Kobe School of Literature Psychology Department Graduate, Hyogo College of Medicine Graduate.
After her experiences with Hyogo College of Medicine Hospital, Nishinomiya Central Municipal Hospital and Palmore Hospital she joined Oak Clinic.
Wants to let her own personal experience with infertility and the skills she learned at Edinburgh University, such as the culturing method of premature oocytes, to be her practice.
Additionally, from early on, gave attention to the correlation of infertility and obesity, and based from the results of a patient who showed success with dropping 14kg in a matter of only 2months she was able to correct the patient’s ovulation problem and also gave birth to the diet program.
She has many presentations at conferences both in Japan and abroad.
“The influence of body mass index (BMI) on pregnancy outcome among Japanese infertile women” was presented at the 2013 ASRM (American Society for Reproductive Medicine).

Japanese Society of Reproductive Medicine Reproductive Medicine Specialist / Instructor
Japanese Society of Obstetrics and Gynecology Specialist Physician.
Maternal Protection Act Designated Doctor.

Subspecialty：Counseling

From the Hyogo College of Medicine Hospital Obstetrics and Gynecology Department Classroom to the Takarazuka Municipal Hospital, alongside Dr. Kenichiro Ikuma - a leading expert in laparoscopic surgery, she performed many laparoscopic surgeries.
She presented, “Laparoscopic surgery to create a vagina with ‘S-Colon’ disease for the congenital absence of the vagina”, which was quite innovative at the time. She wielded this skill at the National Shinoyama Hospital, and the Adventist Hospital of Kobe.
From 2005, she joined Oak Clinic, sumiyoshi.

She wrote in her thesis about “Single curettage endometrial biopsy injury in the proliferative phase improves reproductive outcome of subsequent in vitro fertilization-embryo transfer cycle in infertile patients with repeated embryo implantation failure”.

Reproductive Medicine Specialist certified by the Japan Society for Reproductive Medicine.
Japanese Society of Obstetrics and Gynecology Specialist Physician.
Maternal Protection Act Designated Doctor.

Graduate from Kyoto Prefectural Medical University, after working at the National Maizuru Hospital, Kyoto Prefectural Yosanoumi Hospital, and Matsushita Memorial Hospital he then joined Oak Clinic, Sumiyoshi.
He is the doctor with a rich experience of the hysteroscope surgery.
Presently, he is in charge of a wide range of practices from cooperating with the Urology Department to the testicular extraction of sperm (TESE) to hormone treatment, centering on male infertility.

Thesis Paper:
Effect of medroxyprogesterone acetate, a synthetic progestogen, on the expression of heat shock proteins in cisplatin-resistant uterine endometrial cancer cells.

Reproductive Medicine Specialist certified by the Japan Society for Reproductive Medicine.
Japanese Society of Obstetrics and Gynecology Specialist Physician.
Maternal Protection Act Designated Doctor.
Member of the Andrology Society.

Subspecialty：Surgery / Male Infertility

Graduate of Kansai Medical University's School of Medicine; Completed education at Kansai Medical University's Graduate School of Medicinal Research.
Dr. Matsubara has experience as Assistant Professor at Kansai Medical University's Hospital, and as Medical Chief of outpatients.
After working at Teranishi Houon Group Nagayoshi Hospital and Narimoto Ladies Hospital, Dr. Matsubara joined Oak Clinic.
He is skilled in Ob & Gyn Endocrinology, and Laparoscopic Surgery.

Thesis paper:
Relationship of platelet-activating factor and platelet-activating factor acetylhydrolase activities in uterus and placenta of pregnant rat.

Japanese Society of Obstetrics and Gynecology Specialist Physician.
Maternal Protection Act Designated Doctor.

Graduated from University of Tsukuba.
After her time at University of Tsukuba Hospital, Kiba Park Clinic and Sanno Hospital, she joined Oak Clinic.
Areas of expertise include male infertility treatment (including surgery) and endoscopic surgery. In addition, general infertility treatment.

Published paper
"Title of the article: Verification of the usefulness of a simple automatic sperm analyzer performed at home using a smartphone" Journal of the Japanese Society for Fertilization and Implantation, Vol. 34, No. 2, p68–74 2017

"Study on the awareness of patients and self-injection guidance nurses regarding the usefulness of follicle-stimulating hormone preparation self-injection pen-type and conventional devices" Journal of the Japanese Society of Infertility Counseling, Vol.

Reproductive Medicine Specialist certified by the Japan Society for Reproductive Medicine.
Japanese Society of Obstetrics and Gynecology Specialist Physician.

Graduated from the Faculty of Medicine, University of San Martín de Porres, and the Graduate School of Hyogo Medical University.

Japanese Society of Obstetrics and Gynecology Specialist Physician.
Maternal Protection Act Designated Doctor.

Published paper
Comparison of urinary and recombinant follicle-stimulating hormone in in vitro growth, maturation, and fertilization of mouse preantral follicles.

Graduated from Yokohama City University.
Worked at International University of Health and Welfare, Center for Clinical Medical Research, Sanno Hospital Women's Medical Center, Ofuna Central Hospital, etc.

Reproductive Medicine Specialist certified by the Japan Society for Reproductive Medicine.
Certified urologist by the Japanese Society of Urology.

Graduated from Kyoto Prefectural University of Medicine and completed
postgraduate studies at the same university. After serving as a
professor at Kyoto Prefectural University of Medicine and director of
the affiliated hospital, Dr. Kitawaki has been honored with the title
of Professor Emeritus.
He has also authored and published 200 English papers.

Specializes in reproductive endocrinology, endometriosis, reproductive
medicine, laparoscopic surgery, and women's health care.

Holds certifications from the Japan Society of Obstetrics and
Gynecology as an instructor, from the Japan Society of Reproductive
Medicine as a reproductive medical instructor, and from the Japan
Society of Obstetrics and Gynecology Endoscopy as a certified
technician, among others.

Holds positions as a member of the Advanced Medical Conference of the
Ministry of Health, Labour and Welfare, and serves as a director for
the Japan Society of Reproductive Medicine, the Japan Society of
Women's Health, and the Japan Endometriosis Society.

Graduated from the School of Medicine at Kindai University and completed her residency at Kindai University Hospital before joining Oak Clinic. During her tenure at Kindai University Hospital, she focused on infertility treatment, laparoscopic surgery for benign conditions, women's health care, and student education. In 2020, during her secondment to Oak Clinic, she discovered a deep interest in infertility treatment and decided to continue her involvement, becoming a full-time staff member at Oak Clinic in 2024.

Published Paper
・Conservative Management for Retained Products of Conception in Late Pregnancy
(paper on retained placenta after delivery)
・Older Women's Reproductive Outcomes May Not Be Improved by the Endometrial Receptivity Analysis Test: A Case Report
(paper on ERA Tests in elderly patients)
・Analysis of Re-operation in Laparoscopic Myomectomy for Uterine Fibroids

Japan Society of Obstetrics and Gynecology: Board-certified Obstetrician and Gynecologist, Obstetrics and Gynecology Instructor
Designated Physician under the Maternal Protection Act
Japan Society for Reproductive Medicine: Certified Specialist in Reproductive Medicine Japan Society of Human Genetics: Clinical Genetics Specialist

Graduated from Shiga University of Medical Science. With extensive experience at institutions such as Osaka City University Hospital, Osaka City Sumiyoshi Municipal Hospital, and Osaka City General Medical Center, he brings a wealth of expertise to his current role at the Oak Clinic. Dr. Fukumasu specializes in fetal diagnosis, ensuring the highest standards of care for expectant mothers and their unborn children.

Designated Physician under the Maternal Protection Law
Japanese Society of Obstetrics and Gynecology Specialist Physician

Graduated from Osaka Medical University
Previously worked at the University of Ryukyu Hospital, Okinawa Red Cross Hospital, and Naha Municipal Hospital before coming to Oak Clinic.

Japanese Society of Obstetrics and Gynecology Specialist.
Maternal Protection Act Designated Doctor.

Akita University School of Medicine, Jichi Medical University Graduate School of Medicine Graduate. Worked at Jichi Medical University Hospital, Kamitsuga General Hospital, International University of Health and Welfare, Hyogo College of Medicine Hospital and others.

Japanese Society of Obstetrics and Gynecology Specialist Physician.
Reproductive Medicine Specialist certified by the Japan Society for Reproductive Medicine.
Maternal Protection Act Designated Doctor.

Graduated from Kyoto Prefectural University of Medicine.
Worked at Kyoto Prefectural University of Medicine, Fukuchiyama Municipal Hospital, etc.

Japanese Society of Obstetrics and Gynecology Specialist.
Japan Medical Specialty Organization for Medical Specialties.
Certified by the Japanese Society of Obstetrics and Gynecology Genetic Practice.

Graduated from Hyogo Medical University. Currently employed at Kinki University Hospital.

Certified by the Japan Society of Obstetrics and Gynecology.

Graduated from Kyoto Prefectural University of Medicine.
Worked at Kyoto Prefectural University of Medicine.

Japanese Society of Obstetrics and Gynecology Specialist/Medical Advisor.
Japan Medical Specialty Organization for Medical Specialties.
Maternal Protection Act Designated Doctor.

Graduated from the University of Tsukuba, School of Medicine.
Worked at Tsukuba Gakuen Hospital.

Certified urologist by the Japanese Society of Urology.
Reproductive Medicine Specialist certified by the Japan Society for Reproductive Medicine.