What is the oldest tree in Hiroshima?

Hiroshima's tree list was not built to answer this question. The city began registering trees in 1996 on one criterion, that they were within roughly two kilometres of the hypocentre and survived the bomb, and what it records for each is species, address, owner and distance in metres. There is no age column and no girth column, so an honest answer has to come from somewhere else. Two places are worth trusting. Shirakami Shrine has stood on its rock outcrop in the middle of the city since long before the modern street plan, and the three camphors in its courtyard were mature trees in 1945. Shukkeien was laid out in 1620 for the Asano lords of Hiroshima and its ginkgo, muku and black pine were all standing when the bomb went off 1,370 metres away. What every tree on this page does have is a floor nobody can argue with: it was alive on 6 August 1945, which makes it at least 81 years old. If you know of a measured age for any of them, tell us.