Abstract
Among nonnuclear-weapon state, Japan is the only country which is advancing nuclear fuel cycle program such as uranium enrichment, reprocessing of nuclear fuel and developing fast-breeder reactor. For gaining international acceptance, Japan has taken measures such as accepting IAEA safeguards and compliance with London guideline to untangle concerns about nuclear proliferation. However, there has been a delay in development of regal framework about control of information relating to sensitive nuclear technology. Laws and regulations which control the outflow of nuclear-related technology and service to other countries have already been established pursuant to London guideline. Meanwhile additional penalty against person who made unauthorized disclosure of sensitive information, which has potential for development of nuclear weapons, such as uranium enrichment and obligation of confidentiality has not been established by law. Official security clearance system which qualifies person to access sensitive information has not also been established but been left to nuclear companies. It is necessary to establish regal framework about control of information relating to sensitive nuclear technology as soon as possible in order not to contribute proliferation of nuclear weapons as a result by unauthorized disclosure of sensitive information by imprudent person.
