Centers & Services

Obstetrics and Gynecology Department

What is the Obstetrics and Gynecology Department?

The Department of Obstetrics and Gynecology comprehensively deals with women's total health care. We provide appropriate medical care from puberty, through pregnancy and delivery, to after menopause, including diagnoses and treatments of female genital tumors.

Our physicians

Director, Obstetrics and Gynecology Department

Hisashi Masuyama, Professor
[Perinatal Medicine, Gynecological Oncology]


Yasuhiko Kamada Lecturer [Reproductive endocrinology, reproductive immunology, female psychosomatic medicine]
Keiichiro Nakamura Lecturer [Gynecological Oncology]
Kei Hayata Lecturer [Perinatal medicine, clinical genetics]
Tomonori Segawa Assistant professor [Perinatal Medicine]
Tomoyuki Kusumoto Assistant professor [Gynecological Oncology]
Sayoko Kotani Assistant professor [Reproductive Medicine]
Ai Sakamoto Assistant professor [Reproductive Medicine]
Eriko Eto Assistant professor [Perinatal Medicine]
Shoko Tamada Assistant professor [Perinatal Medicine]
Takeshi Nishida Assistant professor [Gynecological Oncology]

*Specialty shown in [ ]

Weekly schedule of outpatient physicians

Monday Tuseday Wednesday Thursday Friday
Clinical sections available by day of the week AM First-visiting Obstetric check Gynecological revisiting patients   Reproductive endocrinology, Infertility Menopause/ PMS
Gender clinic
  Obstetric check Gynecological revisiting patients   Reproductive endocrinology, Infertility Recurrent pregnancy loss Gender clinic   Obstetric check   Heredity First-visiting Obstetric check Gynecological revisiting patients Heredity Reproductive endocrinology, Infertility Menopause, PMS
Gender clinic
  Obstetric check  
  Reproductive endocrinology, Infertility  
Gender clinic

Treatment system

We provide medical care divided into four specializations: perinatal medicine, oncology, productive endocrinology and women’s health. The specialists provide medical care for outpatients and inpatients while addressing medical education and clinical and basic studies.

Treatment policy

We choose an evidence-based treatment policy by satisfactory discussion in a team conference and then conduct joint meetings among related departments. On the patient’s behalf, we provide highly advanced, safe, and effective medical care.


Using fetal ultrasound and MRI for more precise antenatal testing, we collaborate with related departments for fetal control and manage pregnancy complications and abnormal pregnancy. For many cases of female genital tumors, we combine surgery, chemotherapy, and radiation therapy to provide multidisciplinary treatments and to gain good treatment results. Additionally, we offer specialized outpatient clinic services for recurrent pregnancy loss and gender identity disorders, actively tackling related problems.

Scope of target diseases

  • Perinatal medicine
    Management of complication pregnancy (diabetes, hypertension, maternal heart disease, kidney disease, mental disease, connective tissue disease, etc.); management of complications of pregnancy (pregnancy-associated hypertension syndrome, placenta previa, multiple conception, placental abruption, cervical incompetence, premature rupture of membranes, threatened premature labor, and uterine fibroid); prenatal diagnosis and control of fetal malformation (cardiac malformation, hydrocephalus, gastrointestinal defect, chromosomal abnormality, etc.). Among patients with such disorders, patients with fetal cardiac malformation and pregnancy complicated with uterine fibroid have been referred to the department from across the country.
  • Tumors/Oncology
    Malignant tumors (cervical cancer/endometrial cancer, ovarian cancer, vulva cancer, fallopian tube cancer, vaginal cancer, chorionic cancer, etc.) and benign tumors (uterine fibroid, ovarian tumor, etc.)
  • Reproductive endocrinology
    Infertility, recurrent pregnancy loss, puberty, menopause, menstrual abnormalities (endometriosis, polycystic ovarian disorder, premenstrual syndrome, etc.), development abnormality of female genitals such as the absence of vagina and vaginal atresia, and gender identity disorder

Description of medical care

The Department of Obstetrics and Gynecology is the only department engaged comprehensively in the well-being and quality of life of women.
The Department of Obstetrics and Gynecology, Okayama University Hospital is making efforts night and day to provide first-line treatments over all fields of obstetrics and gynecology to our patients.
Fundamentally, outpatient clinic services require an appointment in advance to reduce wait times to the greatest degree possible. Additionally, outpatient clinical days for first-visiting patients are Monday and Thursday.
However, if your primary doctor makes an inquiry through the General Patient Support Center (Community Health Care-affiliated Room), you can make an appointment for another day. For more information about different specialized outpatient treatment services, see the site.
Inward treatment service offers floor nursing at the fourth floor of the east side of inward block, the Perinatal Mother and Child Center (Obstetrics Department and Neonatal Intensive Care Unit (NICU)) and at the fourth floor of the west side (Gynecology and Obstetrics Department). For more information related to the Obstetrics Department's inward block, please refer to the page of the Perinatal Mother and Child Center.

  • Careful conference takes place before operation.

  • Perinatal Mother and Child Center (NICU)

Highly advanced/specialized medical treatments

Techniques covered by health insurance programs

  • Uterine myomectomy in pregnancy and caesarean section
  • Bladder function conservation in radical hysterectomy for cervical cancer
  • Challenging uterine fibroid /uterine adenomyosis myomectomy, which other hospitals cannot perform
  • Vaginoplasty
  • Laparoscopic surgery for endometrial cancer

Main methods for testing and explanation

  • Ultrasonography: fetal and genital tumor screening, detailed examination
  • MRI: detailed examination of tumors and fetal and placenta
  • CT: search for metastasis of malignant tumors
  • PET/CT: diagnosis of malignant tumor and search for metastasis
  • Colposcopy: detailed examination of the cervix and vagina
  • Hysteroscopy: detailed examination of intrauterine lesions
  • Fetal chromosomal test using maternal blood (NIPT) and genetic counseling

Main testing methods and medical equipment

Perinatal Mother and Child Center

Since March, 2008, when the Perinatal Mother and Child Center was founded at the new inward block, it has managed high-risk pregnancy with different complications as a core center of local perinatal medicine in Okayama prefecture. Furthermore, NICU is operated in cooperation with the Pediatric Department, providing treatments for premature neonates and newborns with complications.

Okayama University Perinatal Open System

In April 2006, the Okayama University Perinatal Open System was launched as a model project by the Health, Labour, and Welfare Ministry before the rest of the country. For pregnant women (especially those at risk of pregnancy and birth) to deliver children more safely, we provide part of beds as open beds in the Obstetric Department, so that they can undergo a medical examination at their regular clinic or hospital and so that they can deliver at the well-equipped university hospital with good staff. Register in early pregnancy, and you can have an examination by the university physicians if you need help, and attend the mother classes provided by the university hospital. In addition, you can ask your regular doctor to be present at the birth.
Presently, 24 physicians from 17 hospitals in Okayama city are participating in the system. In cooperating hospitals, posters and brochures outlining the system are available.

Prenatal diagnosis

We make diagnoses of fetal structural anomaly and fetal cardiac malformation and conduct perinatal management. Especially, in terms of fetal heart abnormality screening, which is approved as a highly advanced medical treatment, full-time physicians make careful diagnoses. If any abnormality is found, we provide coherent treatment hand-in-hand with the teams of pediatric cardiologists and cardiovascular surgeons. We also offer NIPT. To arrange an examination, please make an appointment in advance.

Enucleatic myomectomy during pregnancy and at caesarean section

When a uterine fibroid that is likely to cause abortion or premature birth is found after the patient is informed about pregnancy, we actively perform enucleatic myomectomy as indicated, even during pregnancy. The number of our cases is the greatest in Japan; moreover, the outcomes are good. In 87% of our patients undergoing the enucleatic myomectomy, preoperative symptoms disappeared. They became able to live the same life as other pregnant women without a uterine fibroid.
Additionally, when a uterine fibroid is found at caesarean section, it will usually be left at other hospitals. However, if it is not removed, it might cause different types of complications such as uterine subinvolution, lochiometra, endometritis, dysmenorrhea, and infertility. Consequently, keeping the QOL of patients in mind, we concurrently perform C-section and enucleation to obviate a second surgery.

Combined modality therapy of gynecological malignant tumors, outpatient chemotherapy

Our department is a specialized hospital for gynecological tumors certified by the Japan Society of Gynecologic Oncology and has as many as four physicians specializing in gynecologic oncology. The treatment strategy for malignant tumors (cancers) has been advancing constantly to be diversified. On the bases of surgical treatments, chemotherapy (anti-cancer drugs), and radiation therapy, we decide the appropriate treatment policy for each patient through a meeting by all the staff every week, aiming to complete cure malignant tumors. Furthermore, depending on advanced stage of cervical cancers, we perform either uterine conservation surgery for future pregnancy or nerve-sparing extended hysterectomy for reducing postoperative complications.
Additionally, we actively offer single-day outpatient chemotherapy per week as indicated.

RALS: remote afterloading system

We perform intrapelvic irradiation using RALS as part of radiation therapy for cervical cancers. This device improves the irradiation accuracy and reduces much of treatment service and consequently patients' burden as well.

Uterine cervix conization using ultrasonic scalpel

To reduce bleeding, we use ultrasonic scalpels, which are very useful for section and hemostasis in uterine cervix conization for early cervical cancer and precancerous lesions (intraepithelial carcinoma and dysplasia).

Less invasive surgery (resulting in less scarring) for benign gynecological tumors

We actively provide treatments through a laparoscope for benign gynecological diseases (uterine fibroid and ovarian cystoma). Additionally, for intrauterine polyp and submucous uterine myoma, we provide treatments while observing the inside of the uterus using a uteroscope (resectoscope). In each surgery, the length of stay is four to six days. The attendant pain is less, so a patient can return to society quickly.

Laparoscopic examination and surgery for infertility

We actively perform not only general fertility treatment and in vitro fertilization/embryo transplantation but also systematic laparoscopic examination, which is useful to study causes of infertility, and surgery. Patients with infertility, which is presumably caused by inflammation or adhesion in the abdominal cavity, are mainly indicated. However, in patients with unexplained infertility, we sometimes found endometriosis or peritubal adhesion, which has never been found before. Whenever necessary, we also conduct uteroscopic or falloposcopic tuboplasty (FT catheter). Moreover, we accept referrals for laparoscopic examination and surgery from private physicians.

Diagnosis and treatment of recurrent pregnancy loss

We stress diagnoses and treatments for recurrent pregnancy loss, in which a patient repeatedly experiences abortion, stillbirth, or fetal growth retardation (baby does not grow). Although we take in the latest treatment methods, this report describes our university's original management methods such as blood flow evaluation in different related academic conferences.
We have actively provided low-dosage aspirin/heparin therapy as a treatment with an anticoagulant for cases associated with blood clotting defect such as antiphospholipid antibody syndrome and achieved a good pregnancy continuity rate. Additionally, we respond to gamma globulin therapy.

Specialized outpatient for premenstrual syndrome (PMS/PMDD)

Premenstrual syndrome means symptoms (PMS/PMDD) such as frustration and depression that regularly occur before menses. Although many women complain of mild symptoms, some women who are too affected to do work or housework and therefore have difficulties at work or home, must be treated. Our department has opened specialized outpatient clinic for PMS/PMDD, aiming at improvement of women's quality of life.

Gender clinic

We provide treatments for many patients with gender identity disorders in cooperation with related departments.

Second opinion outpatient service

Expert physicians respond to patients who are receiving treatments at other hospitals and questioning them. Please talk to your primary physician and make an appointment in advance through our patient support room if you are seeking a second opinion.