●Contact us



This clinic provides patients with peace of mind and hope. We provide treatments with clear evidence of improving immunity. In-person meetings at our clinic with sufficient time for a consultation are available. Telephone consultations and telemedicine are also available. Currently, our patients are from all over Japan and even from overseas. Recently there has been a rapid increase in the following types of patients:
●Those who are undergoing cancer treatment and wish to receive additional treatment that is gentle on the body.
●Those who have been told that there is no further treatment for cancer.
●Those who are worried about cancer recurrence
●Those who do not wish to receive Western medical treatment for cancer (surgery, radiation therapy, and/or anti-cancer drugs)
●Those with after-effects of the novel coronavirus
●People with incurable diseases/intractable diseases

●Precision Medicine

The basic prescription for the medicines we handle is the herbal medicine named Huaier, which has clear evidence of anti-cancer properties, and Chinese herbal medicines are added as appropriate. It’s precision medicine, like former President Barack Obama’s 2015 initiative.

●Office Hours

Telemedicine is available 24 hours a day (even on holidays)
Visiting hours are from 9:00 to 17:00. (Even holidays are available)

●About Huaier

Huaier is an herbal medicine with clear evidence of anti-cancer properties. It succeeded in a large-scale randomized clinical trial involving 1,000 patients after surgery for liver cancer, with the survival rate as the end point. The only side effect of Huaier is mild diarrhea which occurs rarely. Also, strangely enough as it is with Chinese medicine, it is possible to suppress an overactive immune system. Unlike Western drugs, it is attractive because it has a bidirectional effect for the immune system. Therefore, Huaier is clearly effective for various diseases and symptoms which are caused by suppression as well as upregulation of the immune system.

●About Doctor

Masanori Niimi, MD, D.Phil. FACSS

Academic & Work Experience
Medical School: Keio University School of Medicine
Postgraduate: Oxford University Wadham College
Until 2020: Professor of Teikyo University Graduate School (Surgery, Immunology & Oriental Medicine)
From 2020: Director of Masanori Niimi Clinic

1997 Young Investigator Award of the American Society of Transplantation
2013 IgNobel Prize (Brain & Immune system)


Masanori Niimi Clinic is located 80 meters (1 minute walk) from the west exit of JR Iidabashi Station on Waseda Dori Ave. to the left of Fujimi Church, above Doutor Coffee (1st floor) on the 5th and 6th floors.

5th & 6th floor, Iida Building,
2-3-10 Fujimi, Chiyoda-ku, Tokyo
Tel: +81-(0)3-5357-1943
Postal Code: 102-0071