Supposedly taken by Photographer Yoshito Matsushige.
Testimony of Yoshito Matsushige
Yoshito Matsushige was a 32 year old cameraman for the Chugoku Newspaper at that time. He was at his home in Midori-cho, 2.7kilometers from the hypocenter when the A-bomb was dropped. He walked around the city right after the bombing and took five photographs which have become important historical documents.
Another Article
Photos are here
Sorry for not uploading them onto FG but as I am not sitting at my beloved Mac but rather on the corporate Windoze.. I am unable to get anything other than enormous bitmap files from the site above.