Koji Tomita

Koji Tomita’s first experience of the United States came as an exchange student aged nineteen at Davidson College in 1977. He later graduated in law from the University of Tokyo and entered the Foreign Ministry in 1981. His diplomatic career included assignments in London and Paris, ambassadorships in Israel and South Korea, and service as Prime Minister Shinzo Abe’s personal representative for the Osaka G20 summit. 1, 2

Tomita specialized in security policy and the American alliance. Before becoming ambassador, he served as deputy chief of mission in Washington and director-general of the North American Affairs Bureau. In the latter part of that career he helped prepare Abe’s 2015 official visit to the United States and worked on Japan’s peace and security legislation. President Joe Biden received his credentials as ambassador on February 17, 2021. Tomita returned to Davidson in March 2023, answering students’ questions about diplomacy and tensions in the Indo-Pacific. 1, 2

Alongside diplomacy, Tomita wrote biographies of Winston Churchill and Margaret Thatcher in Japanese. His Thatcher book won the Yamamoto Shichihei Award. 1

Washington Appointments

  • Japan — Ambassador, 2021–2023

Sources

  1. His Excellency Koji Tomita

    Embassy-supplied biography

  2. Japanese Ambassador Returns to the Start of His Diplomatic Path: Davidson College

    1977 exchange and March 2023 return

  3. Ambassador Shigeo YAMADA — official biography

    Exact title; Assumed post in December 2023; Previous Washington postings; 2023 G7 Political Director role

  4. Pool Reports of July 8, 2022

    Biden met Tomita and signed Abe condolence book at ambassador residence, explicitly corrected from embassy in report #8; White House press-office confirmation quoted in report #11

Biography checked 2026-10-28.

Cite or Reuse This Biography

Koji Tomita. Chanceries Diplopedia. Biography reviewed 2026-10-28. Record 177454d0df2e763d. https://chanceries.org/diplopedia/people/koji-tomita-f423f4668f/

Download citation
Correction note

Send a correction to [email protected].

Biography: Koji Tomita