Diplomatic relations between the Japanese and Thai governments were established in 1887. Until August 16, 1941, relations between the Japanese and the Thai governments were on legations level, then raised to embassy level. These relations were suspended between 1945 and 1952 following the Japanese surrender.
Ministers Plenipotentiaries
1. Manjiro Inagaki 1897-1907
2. Shosaku Matsukata 1907-1908
3. Sakuya Yoshida 1908-1915
4. Genshiro Nishi 1915-1921
5. Tokichi Masao 1921-1922
6. Chonosuke Yada 1922-1926
7. Kyujiro Hayashi 1926-1928
8. Yasukichi Yatabe 1928-1936
9. Itaro Ishii 1936-1937
10. Kuramatsu Murai 1937-1941
11. Yasusato Futami 1941
Ambassadors
12. Teiji Tsubogami 1941-1944
13. Kumaichi Yamamoto 1944-1945
14. Koichi Suzuki (head of the liaison office) 1951-1952
15. Ichiro Ota 1952-1956
16. Shinichi Shibusawa 1956-1959
17. Akira Ohe 1959-1963
18. Hisanaga Shimazu 1963-1964
19. Yoshio Kasuya 1964-1967
20. Morisaburo Seki 1967-1968
21. Torao Ushiroku 1968-1972
22. Masato Fujisaki 1972-1976
23. Hiroshi Hitomi 1976-1980
24. Motoo Ogiso 1980-1983
25. Masatada Tachibana 1983-1986
26. Akitane Kiuchi 1986-1988
27. Hisahiko Okazaki 1988-1992
28. Hiroaki Fujii 1992-1994
29. Takashi Onda 1994-1996
30. Hiroshi Ota 1996-1999
31. Nobutoshi Akao 1999-2002
32. Atsushi Tokinoya 2002-2005
33. Hideaki Kobayashi 2005-2008
34. Kyoji Komachi 2008–2010
35. Seiji Kojima 2010–2012
36. Shigekazu Sato 2012–2015
37. Shiro Sadoshima 2015–2021
