The Peace Memorial Park in Hiroshima is well done.
There’s a calmness and serenity that contrasts completely with the earth-shattering violence of the explosion that happened 2,000 feet or so above it on August 6, 1945.
An airburst would deliver the most devastation and so the bomb Little Boy was fitted with an altimeter that ensured detonation at just the right height. Ironically that type of altimeter was a pre-war Japanese invention.
Today Hiroshima’s city centre is dominated by the A-dome, the remnants of what was a riverside exhibition hall. It was well-built and a skeleton of the structure was left standing after the bomb was dropped.
By the end of 1945 injuries and radiation had killed another 70,000. The city had 350,000 inhabitants.
The attack on Nagasaki three days later wasn’t as deadly because the bomb was off-target and the hilly landscape there wasn’t as conducive to death and destruction.
President Obama has decided to visit Hiroshima tomorrow. It’s a trip his 10 predecessors since Truman have avoided.
Most of the Japanese we’ve spoken to here think the presence of a sitting US president is long overdue.
The White House says there will be no apology and most Japanese aren’t looking for one.
They want him to see the effect nuclear bombs have and to help rid the world of such weapons.
The Mayor of Hiroshima says it’s high time to set aside the issue of an apology.
Mr Matsui Kazumi told ITV News: “If we insist on apologies we will never move forward. It’s been seventy years already. Let’s set the issue aside and work together for a better world."
Addressing nuclear proliferation has been a cornerstone of the Obama presidency.
His pledges in that regard helped him win the Nobel Peace Prize back in 2009.
Mr Obama will regard last year’s deal to limit Iran’s nuclear programme as one of his signature achievements.
In Hiroshima we’ve found no rage or resentment towards the Americans.
They think the bombing was a mistake and want to make sure the attacks here are not repeated.
Visitor numbers at the Peace Memorial Park are going up every year. The average age of survivors is now over eighty. Their children are now telling the stories of that dreadful day and its aftermath.
Japan has learned a lesson it hopes the world will never forget.