us ambassador to japan, caroline kennedy, waves before she delivers opening remarks during an appearance at waseda university in tokyo on wednesday  japanese police were investigating phone calls threatening to kill us ambassador caroline kennedy and another american envoy, authorities said on wednesday tokyo police were investigating calls to the us embassy threatening to kill kennedy and similar ones targeting alfred magleby, the us consul general based on the southern island of okinawa, according to police sources tokyo police declined to comment the embassy also did not comment, citing policy regarding the ambassador's security kennedy was due to meet with first lady michelle obama on her arrival in tokyo on wednesday to promote her 'let girls learn' education initiative obama's arrival coincided with a speech made by former us president bill clinton at a tokyo university on wednesday afternoon alongside kennedy and japanese prime minister shinzo abe as they attended a symposium on the legacy of assassinated john f kennedy okinawa is home to about half of the 50,000 american troops based in japan japanese media reports said that the death threats came last month from a caller speaking in english, and that police were looking into the case on suspicion of blackmailing no other details, including motives, were known kennedy was due to meet with first lady michelle obama on her arrival in tokyo on wednesday (pictured) to promote her 'let girls learn' education initiative  cbs reported that jfk's daughter was often seen mixing freely with crowds during her high profile outings in japan the state department said in a statement on thursday: 'we take any threats to us diplomats seriously 'we take every step possible to protect our personnel we are working with the japanese government to ensure the necessary measures are in place we will not comment on the specific details of any threats or the steps we take to address them' earlier this month, the us ambassador to south korea, mark lippert, was knifed by an anti us activist in seoul and had to be hospitalized for several days lippert suffered a deep facial gash and stab wound to his wrist after being attacked by a knife wielding pro north korean activist during a breakfast forum former us president bill clinton was also in attendance at the tokyo event on wednesday here, he bids a farewell to the audience after delivering a keynote speech at the jfk international symposium held at waseda university  injured us ambassador to south korea mark lippert, center, gets into a car to leave for a hospital in seoul, south korea on march 5 after being attacked by a man wielding a razor 
tokyo the us embassy kennedy alfred magleby us okinawa japanese last month english
tokyo police were investigating calls to the us embassy threatening to kill kennedy . similar calls were made targeting alfred magleby, the us consul general based on the southern island of okinawa . japanese media reports said death threats came last month from a caller speaking in english, and that police suspected blackmailing 