Former Whitehall adviser Patrick Rock has been bailed to appear at Westminster Magistrates Court on July 3 after he was charged over child abuse images.
Judith Reed, a senior lawyer with the CPS Organised Crime Division, said: "We have determined that there is sufficient evidence for a realistic prospect of conviction and that a prosecution is in the public interest."
More top news
Satoshi Uematsu, 26, was sent to the Yokohama District Public Prosecutors Office in Kanagawa prefecture.
West Yorkshire Police confirmed a 32-year-old woman was taken into custody in connection with the alleged threats.
Five women shared their views about whether Hillary Clinton's Democratic presidential nomination is a defining moment in US history.