The blast threw him into the air, melted his cotton shirt and took the skin off his back and one arm. He survived horrible pain, spending nearly two years lying on his stomach, to become a leading spokesman for the abolishment of nuclear weapons.
Taniguchi died Wednesday in Nagasaki at age 88, according to Motoko Rich's obituary in The New York Times. The cause was duodenal papilla cancer, the newspaper said, not disclosing whether the cancer was connected to the atomic radiation he endured.
The anti-nuclear activist was among about 165,000 remaining survivors of the atomic bombings in Nagasaki and Hiroshima, Japan, the obituary said. The survivors are known in Japan as hibakusha. Three days before the Nagasaki bombing, Hiroshima had been destroyed in history's first atomic attack.
When giving speeches calling for the end of nuclear weapons, Taniguchi sometimes would show pictures of his burns, the obituary said. A decade after the war's end, when he had learned to so stand and walk again, Taniguchi began his career fighting the spread of nuclear weapons.
Each year on the anniversary of the Nagasaki bombing, and any time a country conducted a nuclear test, he'd attend a sit-in at Nagasaki's peace park. Over the years, he appeared at 396 protests, the Nagasaki Shimbun reported.