Clinic introduction

Clinic introduction

Hello there,

Hello there,

Our clinic provides medical care in the fields of internal medicine, gastroenterology, endoscopic medicine, and gastrointestinal medicine.
Regularly undergoing gastric endoscopy and colonoscopy examinations can help prevent stomach and colon cancer by detecting and treating them early.
Our clinic's endoscopic procedures prioritize patient comfort through the use of sedatives, and we also conduct examinations on weekends to enhance convenience. We strive to create an environment where patients can undergo tests with ease.
Rest assured that our examinations and treatments are conducted by physicians who hold qualifications as specialists and instructors certified by the Japan Gastroenterological Endoscopy Society. In addition, we have successfully carried out over 800 Endoscopic Submucosal Dissection (ESD) procedures, which is a highly complex endoscopic surgery for early-stage gastric cancer, colon cancer, and esophageal cancer.

Clinic philosophy

Clinic philosophy
  1. Strive to eliminate deaths from stomach cancer, colon cancer, and esophageal cancer (early detection will not affect prognosis)
  2. Provide comfortable endoscopy examinations with minimum pain

Main Features of the Clinic

Feature 01Endoscopies and surgeries are performed by specialists from the Japan Society of Gastroenterology.


All endoscopies and surgeries performed at our clinic are performed by physicians who are specialists in the Japan Society of Gastroenterology. Our extensive experience enables us to conduct examinations with high accuracy.

Feature 02Minimal discomfort with endoscopic examinations using sedatives


In endoscopic examinations, we use sedatives to alleviate discomfort. Please feel free to contact us if you have had a difficult experience with an endoscopy in the past.

Feature 03Laxatives can be taken in a semi-private room in the clinic.

We offer a semi-private room for those who need to take laxatives at the clinic.
If you live far away or are uncomfortable taking the medication at home, please contact us.

Feature 04Available for examinations and endoscopies on Saturdays, Sundays, holidays, and early mornings.

We also offer endoscopy slots on Saturdays, Sundays, holidays, and early morning hours. Additionally, although endoscopy normally requires a prior consultation, in some cases it can be performed on the same day. Please be sure to make a reservation online.

Feature 05For gastroscopy, you can choose to insert the device from the nose (nasally) or mouth (orally)

At our clinic, patients have the option to choose between two types of endoscopy procedures: oral endoscopy, which involves inserting the endoscope through the mouth and is accompanied by sedation to minimize discomfort, and nasal endoscopy, which is inserted through the nose and is less likely to induce gagging.

Feature 06If colon polyps are found during a colonoscopy, they can be removed on the same day

colon polyps

If a precancerous polyp is found during the examination, it is possible to remove the polyp on the spot during the examination. Depending on the size and number of polyps, hospitalization may be recommended. In that case, we will connect you to a partner general hospital.

Feature 07After the examination, patients are transferred to a recovery room where they can lie down comfortably

recovery room

In the case of examinations involving sedatives, rest assured that patients will be transported to the recovery room while lying comfortably on a stretcher. After the examination, patients will not be allowed to walk while still under the effects of sedatives.

Feature 08Introducing Olympus' top-of-the-line model X-1

Our hospital is equipped with the latest endoscopy equipment. Achieving higher precision inspections.

Feature 09Same-day gastroscopy and colonoscopy tests possible

It is possible to undergo an endoscopy of your stomach and colon on the same day. This reduces the number of clinic visits for patients and reduces the burden on their bodies. Please contact us for more details.
*Only if the doctor determines that it is possible after a preliminary examination.

Feature 10Thorough cleaning and sterilization performed after each examination

Our examination instruments undergo cleaning and sterilization after each use, ensuring your peace of mind. We strictly adhere to the hygiene management guidelines set forth by the Japan Gastroenterological Endoscopy Society.

Feature 11Located in HARUMI FLAG, 0 minutes walk from the Hot Plaza Harumi-mae bus stop

Mitsui Shopping Park LaLa Terrace HARUMI FLAG

Our clinic is located on the third floor of Mitsui Shopping Park LaLa Terrace HARUMI FLAG. It is convenient to take a bus or taxi if you are coming from Kachidoki station or Ichiba-mae station. The nearest bus stops are Hot Plaza Harumi-mae for Toei buses and B33 and B31 for Tokyo BRT.

Doctor referral system

Chairman of the Board of Directors, Heiseikai Medical Corporation
Naoki Hirano

The Tokyo Harumi Gastroenterology and Internal Medicine Clinic in Chuo Ward specializes in endoscopy and digestive disorders, while also providing treatment for various other internal medicine conditions. We aim to become a clinic where everyone in the community can feel at ease when seeking medical care. Your support is greatly appreciated.

院長 平野直樹


  • Specialist and instructor certified by the Japan Gastroenterological Endoscopy Society, Council Member of the Kanto Branch.
  • Certified Specialist in General Internal Medicine and Instructor recognized by the Japan Society of Internal Medicine
  • Japanese Society of Gastroenterology specialist
  • Japanese Society of Colorectal Diseases specialist, medical advisor
  • Japanese Society of Hepatology specialist
  • Cancer treatment certified physician
  • Japanese Society for Helicobacter Research certified physician
  • Japan Medical Association certified physician


Gastroendoscopy ¥●●●
Colonoscopy ¥●●●
Gastroendoscopy/colonoscopy ¥●●●

Clinic information

Consultation hours Mon Tue Wed Thu Fri Sat Sun and public holidays
9:00 a.m. - 6:30 p.m.
  • *The clinic is open by appointment only from 1:00 p.m.-4:00 p.m.
  • *Last admission is at 6:15 p.m.
Address 3F Mitsui Shopping Park LaLa Terrace HARUMI FLAG, 5-2-31 Harumi, Chuo Ward, Tokyo 104-0053
Tel 03-5166-8633
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