Reproduction Center


We are introducing state-of-the-art technology and have installed a reproduction center dealing with advanced reproductive medicine. In April of 2007, we extended the In Vitro Fertilization Lab to two rooms, and ensured that the capacity can support up to 20 OPU per day.

In 2016, we opened a clinic with a reproduction center in Ginza, Tokyo as a new base. We have created an environment that makes it easy for you to receive treatment.

Reproduction Center Equipment



Fertilized oocytes, immature oocytes, etc. are cultivated here. The gas concentration, humidity, and temperature are always kept constant so that they are close to the environment inside the uterus.



It is used for work performed at a relatively low magnification such as oocyte inspection, freezing, and thawing.

Cryopreservation Container


A container for cryopreserving embryos, oocytes, and sperm entrusted to us by patients. When stored in liquid nitrogen, the temperature inside reaches close to -200 ℃.

Clean Bench


Equipment for aseptic operation, including a stereomicroscope and an inverted microscope. Oocytes, sperm, and culture medium are all handled in this.

Inverted Microscope


It is a type of microscope that observes an object from below, and is characterized by its high magnification. Most of the operations such as observation, microinsemination (ICSI), and AHA are performed using this microscope.



Used for washing sperm.

Message from the Nurse

In an effort to make it so that the married couple subjected to IVF can relax even just a little bit; we have a variety of considerations. For example, we offer a room for your husband to give his sperm, and a recovery room for your relaxation after oocyte pick-up(OPU) and embryo transplant(ET).

We offer a private room for the patients a long ways from home who wish to stay over night from the previous day. In the hotel grade room, we offer a bath, toilet, TV, a refrigerator, as well as towels. You may also stay over after surgeries of oocyte pick-up(OPU) and embryo transplant(ET). (This service is only Oak Clinic, Sumiyoshi.)


In addition, if you have older children, we can look after them for you. If you make a reservation before hand, our nursery staff will tend to your child in the kids room, “The Orchid Room”. (This service is only Oak Clinic, Sumiyoshi.)


Our features ( Oak Clinic, Sumiyoshi )

We are pleased to be offering a consistent medical system from infertility treatment until the 36th week of pregnancy. In addition, we are practicing with a focus on the pregnancy age period; there is an incalculable merit to the featuring of gynecology and obstetrics. For example, in the case where ovarian tumors and uterine fibroids are found, it will first be considered as pregnancy, and treatment and surgery can be performed.(Patients who go to other hospitals can undergo surgery with us by transferring to Oak Sumiyoshi Obstetrics and Gynecology Department at the time of surgery.)

The goal of fertility treatment is not only pregnancy. The true aim is a safe birth, and a healthy baby. Even if you get pregnant, the journey has not concluded, there are risks we must manage, such as ectopic pregnancy and miscarriage.

Oak Sumiyoshi has an obstetrics hospitalization facility that can handle bleeding in the early stages of pregnancy even at night or on holidays.

We also perform prenatal diagnosis such as quattro test and amniocentesis, so you can manage your pregnancy responsibly. At Oak Sumiyoshi, you can have prenatal exams until 21 weeks and 6 days of pregnancy, and at Oak Clinic, Umeda and Oak Clinic, Ginza until 11 weeks and 6 days.

In April 2007, Oak Clinic, Sumiyoshi stopped handling deliveries and reopened as a specialized facility for advanced infertility treatment 24 hours a day, 365 days a year. Despite this, when we used to handle deliveries, it was a great pleasure to witness the birth of a child we knew since it was an oocyte! Knowing the couples well, staff who witnessed the birth sometimes shed tears with excitement. A pregnant woman with a big tummy will eventually be your own figure. Please don't find fertility treatment painful. Infertility treatment is the treatment of hope.