As he grew older, his opinions about the use of atomic weapons began to change. In his eighties, he wrote a book about his experiences as well as a book of poetry and was invited to take part in a 2006 documentary about 165 double A-bomb survivors (known as nijū hibakusha in Japan) called Twice Survived: The Doubly Atomic Bombed of Hiroshima and Nagasaki, which was screened at the United Nations At the screening, he pleaded for the abolition of atomic weapons.
Yamaguchi became a vocal proponent of nuclear disarmament. He told an interviewer “The reason that I hate the atomic bomb is because of what it does to the dignity of human beings.” Speaking through his daughter during a telephone interview, he said, “I can’t understand why the world cannot understand the agony of the nuclear bombs. How can they keep developing these weapons?”
At first, Yamaguchi did not feel the need to draw attention to his double survivor status. However, in later life he began to consider his survival as destiny, so in January 2009, he applied for double recognition. This was accepted by the Japanese government in March 2009, making Yamaguchi the only person officially recognised as a survivor of both bombings. Speaking of the recognition, he said, “My double radiation exposure is now an official government record. It can tell the younger generation the horrifying history of the atomic bombings even after I die.”
Dearth and burial ground of Tsutomu Yamaguchi.
Yamaguchi lost hearing in his left ear as a result of the Hiroshima explosion. He also went bald temporarily and his daughter recalls that he was constantly swathed in bandages until she reached the age of 12 Despite this, Yamaguchi went on to lead a healthy life. Late in his life, he began like many of the approximately 260,000 survivors of the atomic bombings to suffer from radiation-related ailments, including cataracts and acute leukemia.
His wife also suffered radiation poisoning from black rain after the Nagasaki explosion and died in 2010 (age 93) of kidney and liver cancer after a lifetime of illness. All three of their children reported suffering from health problems likely connected with their parents’ exposures. In 2009, Yamaguchi learned that he was dying of stomach cancer. He died on 04-01- 2010 in Nagasaki at the age of 93 and is buried on Nagasaki cemetery.