1887年日泰两国缔结友好通商条约后，泰国视日本为近代化改革典范，在政治、经济、文化等领域加深对日交流。1932年泰国立宪革命后，銮披汶·颂堪军人政权为确保政权合法性、满足民族资本扩张需要，鼓吹“泛泰主义”，采取亲日、反英法的外交政策，基于地缘政治优势加强与日本的军事合作。1941年太平洋战争爆发后，两国缔结攻守同盟。日本借助泰国支援在东南亚地区迅速扩张，泰国也凭恃日本支持向“泛泰民族”所在地区扩张。最终日本溃败，“泛泰主义”也走向破产。
Since 1887，when Japan and Thailand concluded the Treaty of Friendship and Commerce，Thailand has regarded Japan as a model of modernization and reform，and deepened exchanges with Japan in the political，economic and cultural fields. Thailand adopted a pro-Japanese and anti-British and French foreign policy. After the outbreak of the Pacific War in 1941，the two countries concluded the “Japan-Thailand Offensive and Defensive Alliance”. Japan quickly swept through Southeast Asia with the support of Thailand，and Thailand also expanded into the region where the Thai people were located with the support of Japan，but eventually the “Thai Doctrine” went bankrupt due to the defeat of Japan.
