Kennedy, the daughter of President John F. Kennedy, is currently being vetted for the position, according to CNN. According to ABC, the nomination is not yet final. She would replace current Ambassador John Roos, who has held the post since 2009.
The appointment would make the New York-based lawyer and author the first woman to hold the post in Tokyo.
Although Kennedy has largely remained outside of the political sphere, her high-profile endorsement of President Barack Obama during the 2008 Democratic presidential primaries was seen as a big boost for the then-senator over rival Hillary Clinton. Kennedy backed Obama again in 2012, delivering a speech at the Democratic National Convention in September.
In 2009, Kennedy expressed interest in running for the New York U.S. Senate seat left vacant when Clinton was confirmed as secretary of state. However, she later withdrew her name from consideration, citing "personal reasons."
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John F. Kennedy
President John F. Kennedy speaks at a press conference on August 1, 1963. (Photo by National Archive/Newsmakers)
Husband And Wife
A photo dated in the 1950s shows John F. Kennedy with his wife Jacqueline Bouvier Kennedy. (AFP/AFP/Getty Images)
John Fitzgerald Kennedy is pictured here in this 1960s White House photo. He was the first Catholic, and the youngest person, to be elected as president of the United States (AFP/Getty Images).
U.S. Senator John Fitzgerald Kennedy (JFK) and his wife Jacqueline pose with their son John Jr. on December 10, 1960. (AFP/Getty Images)
Oath Of Office
John F. Kennedy takes the Oath of Office for President of the United States in January 1961. (Photo by National Archive/Newsmakers)
An unlocated photo shows U.S. President John F. Kennedy (R) chatting with Vice President Lyndon B. Johnson in the early 1960s. (AFP/AFP/Getty Images)
U.S. President John Fitzgerald Kennedy (L) meets in January 1961 at the White House, with former U.S. President Harry S. Truman (1884-1972). (AFP/AFP/Getty Images)
At The Podium
John Fitzgerald Kennedy delivers a speech at the Waldorf Astoria hotel in New York city, 29 April 1961.
By His Side
President John F. Kennedy speaks during a press conference as First Lady Jackie Kennedy looks on April 9, 1963 at the White House.
Facing The Press
President John F. Kennedy arrives for a press conference on August 30, 1961 in Washington.
U.S. President John Fitzgerald Kennedy signs the order of naval blockade of Cuba, on October 24, 1962 in the White House, during the Cuban Missile Crisis. (AFP/Getty Images)
John Kennedy Jr. plays in the Oval Office at the White House, Washington, DC, on October 15, 1963.