http://www.washingtontimes.com/news/2012/aug/2/japan-revisits-nuclear-weapons-ban/?page=all Japan revisits nuclear weapons ban
Stockpile of plutonium
Japan has 45 tons of separated plutonium, enough for several Nagasaki-type bombs. Its overall plutonium stockpile of more than 150 tons is one of the world’s largest, although much smaller than those of the U.S., Russia or Britain. 日本已有 45 噸完成分離的鈽, 夠做核武了. 日本的全部鈽儲備量大於 150 噸, 當然數量遠不及美英二國.
http://www.armscontrol.org/act/2009_11/Takubo The Role of Nuclear Weapons: Japan, the U.S., and “Sole Purpose”
http://www.youtube.com/watch?v=HJ2rBDE9n6Y Build Up To WW3- Japan & S.K could develop NUCLEAR WEAPONS Against