Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

Masao Tomonaga

Professor, Honorary Director of the Japanese Red Cross Nagasaki Atomic Bomb HospitalJapan

ExpertHibakusha

Dr. Masao Tomonaga is the honorary director of the Japanese Red Cross Nagasaki Atomic Bomb Hospital and a hibakusha, an atomic bomb survivor. He studied internal medicine and hematology at the Nagasaki University Medical School. Throughout his career he has explained and studied the medical consequences of the atomic bombs, including radiation exposure, cancers, depression, and post-traumatic stress disorder.

Currently, he runs a retirement home for older hibakusha. He is also the Chairman of the Nagasaki Global Citizen’s Assembly for the Elimination of Nuclear Weapons. He advocates that nuclear weapons “should not be produced any more, should never be used again and ultimately abandoned forever.”

To view a 2019 interview with Tomonaga, conducted by the Atomic Heritage Foundation, please click here.

For more on Masao Tomonaga please click here

Masao Tomonaga’s Timeline
1943 Born in Nagasaki, Japan.

1945 Aug 9th Survived the Nagasaki atomic bombing.

2009 Retired from the Atomic Bomb Disease Institute of Nagasaki University.

Related Profiles

Yasuyoshi Komizo

Japan

Yasuyoshi Komizo has been the Chairperson of the Hiroshima Peace Culture Foundation since 2013. He is the former Special Assistant to the Director General of the International Atomic Energy Agency (IAEA).

Jennet Conant

Manhattan, NY

Jennet Conant is a bestselling American author and journalist. She is the granddaughter of Manhattan Project administrator James B.

Jim Eckles

Trinity Site

Jim Eckles worked for decades for the White Sands Missile Range Public Affairs Office, managing open houses and tours of the Trinity site, where the world’s first nuclear test took place.

Hymer Friedell

Oak Ridge, TN

Hymer Friedell was the deputy medical director of the Manhattan Engineer District at Oak Ridge. He worked closely with Robert Stone and Stafford Warren in studying the effects of radiation on the human body.