Talk:Japanese nuclear weapon program/@comment-88.106.122.183-20160619124254

                          Japan’s uranium supply during WW2.

Notes on a recent visit the Mineralogical museum in Ishikawa-machi, Fukuoka-ken.

 The director in charge of the museum has done extensive research of this war time era and produced substantial documentation of the history of the local uranium mining operation. His tome is though in Japanese and would be a mine of information when translated.

A general review of this data reveals a copy of the American SCAP 1945-46 inventory of the mine and shows a stock of around 100 tons of uranium ore of about 2-3 % uranium. A similar quantity appears to have been already shipped for processing and would give a total yielded of about 4-5 tons of uranium, which would have contained about 30-35 Kg U 235.

Note: There are two gentlemen in their 90’s who as school children remember working in the mine until it ceased operation in the middle of August 1945.