The mound contains the ashes of 70,000 victims of the atomic bombing. The bodies were taken here from the surrounding areas after the attack and cremated. Most of the bodies were unfortunately unidentified.
Wikipedia http://ja.wikipedia.org/wiki/%E5%8E%9F%E7%88%86%E4%BE%9B%E9%A4%8A%E5%A1%94
Address Hiroshima, Japan
Coordinates 34°23'40.74" N 132°27'7.289" E