Thank you, America.

Declassified papers show U.S. promoted atomic power in Japan | The Japan Times Online
http://search.japantimes.co.jp/cgi-bin/nn20110725a4.html
The United States used atomic power cooperation with Japan in the 1950s to ease the Japanese public's aversion to nuclear weapons and remedy their "ignorance" about such energy, declassified U.S. papers showed Saturday.

the reaming » "It is important to our relations with Japan that we seek to remove the strong Japanese notion that atomic and nuclear energy is primarily destructive. We should accordingly attempt at an early point to include Japan in bilateral and multilateral actions intended to develop peaceful uses of atomic energy." That November, Japan got reams of atomic energy documents.