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New US ambassador to Japan Caroline Kennedy (2nd L) is welcomed by school children upon her arrival at Mangokuura Elememtary School in the huge tsunami-hit area of Ishinomaki, Miyagi Prefecture, on November 25, 2013. Kennedy, the lone surviving child of the assassinated John F. Kennedy, met Japan's Emperor Akihito on November 19 in a ceremonial formality, which came days before the 50th anniversary on November 22nd of her father John F. Kennedy's assassination. AFP PHOTO/Toru YAMANAKATORU YAMANAKA/AFP/Getty Images
New US ambassador to Japan Caroline Kennedy (2nd L) is welcomed by school children upon her arrival at Mangokuura Elememtary School in the huge tsunami-hit area of Ishinomaki, Miyagi Prefecture, on November 25, 2013. Kennedy, the lone surviving child of the assassinated John F. Kennedy, met Japan's Emperor Akihito on November 19 in a ceremonial formality, which came days before the 50th anniversary on November 22nd of her father John F. Kennedy's assassination. AFP PHOTO/Toru YAMANAKATORU YAMANAKA/AFP/Getty Images

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    Reports: Ambassador Caroline Kennedy faces death threats

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Reports: Ambassador Caroline Kennedy faces death threats

Authorities are investigating death threats against Caroline Kennedy, the U.S. ambassador to Japan, according to Japanese media reports. CNN's Michelle Kosinski reports.

Reports: Ambassador Caroline Kennedy faces death threats

Authorities are investigating death threats against Caroline Kennedy, the U.S. ambassador to Japan, according to Japanese media reports. CNN's Michelle Kosinski reports.