United States Ambassador to Japan
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|Ambassador of the United States to Japan
Seal of the United States Department of State
|Nominator||President of the United States|
|Formation||November 5, 1859|
|Website||U.S. Embassy - Tokyo|
The Ambassador of the United States of America to the State of Japan (Japanese: 日本駐在アメリカ合衆国大使 Hepburn: Nihon Chūzai Amerika Gasshūkoku Taishi?) is the ambassador from the United States of America to Japan.
Since the opening of Japan by Commodore Matthew C. Perry, in 1854, the U.S. has maintained diplomatic relations with Japan, except for the ten-year period between the attack on Pearl Harbor (and the subsequent declaration of war on Japan by the United States) and the signing of the Treaty of San Francisco, which normalized relations between the United States and Japan. The United States maintains an embassy in Tokyo, with consulates-general in Osaka, Nagoya, Sapporo, Fukuoka, and Naha.
Due to the significance of the relations between the two countries in recent years on trade and defense, with Japan being described by the United States State Department as "the cornerstone of U.S. security interests in Asia,"  the post has been held by many significant American politicians, including Mike Mansfield, Walter Mondale, Tom Foley and Howard Baker.
The current ambassador to Japan is Caroline Kennedy, who was nominated by President Barack Obama and confirmed by the Senate on October 16, 2013. Kennedy was sworn in by Secretary of State John Kerry on November 12, 2013, and presented her credentials to Akihito, Emperor of Japan, on November 19, 2013. 
List of chiefs of mission
The following is a list of chiefs of mission.
- Townsend Harris (Presented credentials, November 5, 1859–Presented recall, April 26, 1862)
- Robert H. Pruyn (Presented credentials, May 17, 1862-Left Japan, April 28, 1865)
- Chauncey Depew (commissioned during a recess of Senate; declined appointment)
- Robert B. Van Valkenburgh (Presented credentials, May 4, 1867–Presented recall, November 11, 1869)
- Charles E. DeLong (Presented credentials, November 11, 1869-promoted to Envoy)
|Name||Presented credentials||End of term||End of date|
|Charles E. DeLong||June 9, 1872||Farewell address||October 7, 1873|
|John Bingham||October 7, 1873||Presented recall||July 2, 1885|
|Richard B. Hubbard||July 2, 1885||Presented recall||May 15, 1889|
|John Franklin Swift||May 15, 1889||Died at post||March 10, 1891|
|Frank Coombs||June 13, 1892||Presented recall||July 14, 1893|
|Edwin Dun||July 14, 1893||Presented recall||July 2, 1897|
|Alfred Buck||June 3, 1898||Died at post||December 4, 1902|
|Lloyd Carpenter Griscom||June 22, 1903||Left Japan||November 19, 1905|
|Name||Presented credentials||End of term||End of date|
|Luke E. Wright||May 26, 1906||Left Japan||August 13, 1907|
|Thomas J. O'Brien||October 15, 1907||Left Post||August 31, 1911|
|Charles Page Bryan||November 22, 1911||Left Post||October 1, 1912|
|Larz Anderson||February 1, 1913||Left Japan||March 15, 1913|
|George W. Guthrie||August 7, 1913||Died at post||March 8, 1917|
|Roland Morris||October 30, 1917||Left Japan||May 15, 1920|
|Charles B. Warren||September 24, 1921||Left Japan||January 28, 1922|
|Cyrus Woods||July 21, 1923||Left Japan||June 5, 1924|
|Edgar Bancroft||November 19, 1924||Died at post||July 27, 1925|
|Charles MacVeagh||December 9, 1925||Left Japan||December 6, 1928|
|William Castle, Jr.||January 24, 1930||Left Japan||May 27, 1930|
|W. Cameron Forbes||September 15, 1930||Left Japan||March 22, 1932|
|Joseph Grew||June 14, 1932||American declaration of war||December 8, 1941|
|William J. Sebald||1945||1952|
|Robert D. Murphy||May 9, 1952||Relinquished Charge||April 28, 1953|
|John M. Allison||May 28, 1953||Left Post||February 2, 1957|
|Douglas MacArthur II||February 25, 1957||Left Post||March 12, 1961|
|Edwin Reischauer||April 27, 1961||Left Post||August 19, 1966|
|U. Alexis Johnson||November 8, 1966||Left Post||January 15, 1969|
|Armin H. Meyer||July 3, 1969||Left Post||March 27, 1972|
|Robert Stephen Ingersoll||April 12, 1972||Left Post||November 8, 1973|
|James D. Hodgson||July 19, 1974||Left Post||February 2, 1977|
|Mike Mansfield||June 10, 1977||Left Post||December 22, 1988|
|Michael Armacost||May 15, 1989||Left Post||July 19, 1993|
|Walter Mondale||September 21, 1993||Left Post||December 15, 1996|
|Thomas S. Foley||November 19, 1997||Left Post||April 1, 2001|
|Howard Henry Baker, Jr.||July 5, 2001||Farewell address||February 17, 2005|
|Tom Schieffer||April 11, 2005||Left Post||January 20, 2009|
|John Roos||August 20, 2009||Left Post||August 12, 2013|
|Caroline Kennedy||November 12, 2013|
- "U.S. Relations With Japan". U.S Department of State. U.S Department of State, Bureau of East Asian and Pacific Affairs. Retrieved 2 May 2016.
- "Caroline Kennedy sworn in as ambassador to Japan". CBS News. November 12, 2013. Retrieved 2013-12-11.
- ELAINE KURTENBACH (November 19, 2013). "US envoy Caroline Kennedy meets Japan's emperor". Houston Chronicle.
- Ambassadors of the United States
- Japanese Ambassador to the United States
- Embassy of the United States in Tokyo
- Embassy of Japan in Washington, D.C.
- Foreign relations of the United States
- Foreign relations of Japan
- Japan–United States relations
- U.S. ambassador a role most vital
- United States Department of State: Background notes on Japan
- This article incorporates public domain material from the United States Department of State website http://www.state.gov/r/pa/ei/bgn/index.htm (Background Notes).