Iwamoto Chizuna's Ventures in Siam and the Formation of Modern Japan–Thailand Relations in the 1890s: Japanese Labor Migration, Private Enterprise, and Consular Diplomacy

Abstract

This study reconstructs the activities of Iwamoto Chizuna (1858–1920), a former Japanese army officer who became one of the earliest and most active private Japanese figures in Siam (Thailand) during the formative period of modern Japan–Thailand relations in the 1890s. Drawing extensively on previously unused or little-known primary sources—including Japanese Foreign Ministry records, passport and emigration documents, contemporary Japanese and Bangkok newspapers, Siamese and French diplomatic records, memoirs of early Japanese emigrants, and newly discovered materials preserved by Iwamoto’s descendants—it substantially revises existing accounts of Iwamoto’s career and of the beginnings of organized Japanese labor migration to Siam. The first part reconstructs Iwamoto’s life before his first journey to Siam in 1892 and examines the origins and organization of his schemes for Japanese labor migration. After leaving the army, Iwamoto became increasingly involved in projects concerning Siam and eventually sought to develop three principal forms of economic activity: the export of Japanese merchandise to Siam, the import of Siamese products, particularly teak, to Japan, and the organized migration of Japanese laborers to Siam. His most ambitious undertaking was the last of these. Between late 1894 and 1895, more than fifty Japanese men and women were brought to Siam in two principal groups. The study identifies their origins, recruitment processes, employment, and subsequent experiences in considerably greater detail than previous accounts. The second part incorporates newly discovered sources, most importantly Iwamoto’s unpublished autobiographical manuscript, A Brief Biography of Master Waisui (Waisui Sensei no Ryakuden), written in Bangkok at the end of 1896. This document makes it possible to correct numerous errors and uncertainties concerning Iwamoto’s birth, education, military career, early business activities, and involvement with Siam. The study also reconstructs his relationship with emigration broker Ogura Kō and examines the recruitment of the first and second groups of Japanese emigrants. In doing so, it reassesses contemporary and later accounts, including those of Miyazaki Tōten, whose writings have strongly influenced subsequent descriptions of early Japanese migration to Siam. The experiences of these emigrants reveal the hazardous and poorly organized character of the early migration ventures. Members of the first group initially attempted agricultural settlement in Bangkok, while many subsequently sought employment at the Bukhanun gold mine or on the construction of the Bangkok–Khorat railway. Disease, particularly malaria, caused heavy mortality among those employed in the mining district, while most survivors eventually returned to Japan or dispersed elsewhere. Newly discovered testimony by Omoda Rihei, a member of the first emigrant group, makes it possible to further correct the established narrative concerning their origins, movements, employment, and deaths. The historical importance of Iwamoto’s activities, however, cannot be measured simply by their commercial success or failure. His migration projects became unexpectedly intertwined with the diplomatic status of Japanese subjects in Siam. Because Japan had neither a consulate nor its own extraterritorial jurisdiction in Siam, the growing Japanese community lacked independent consular protection. In September 1895, following French diplomatic initiatives, the Japanese government agreed to place Japanese subjects residing in Siam under French protection. The study reconstructs the circumstances behind this little-known decision and demonstrates that it generated dissatisfaction both among Japanese residents and within the Siamese government, which regarded the expansion of French protégé status as a threat to its sovereignty. The resulting controversy helped stimulate demands for the establishment of an independent Japanese consular presence in Bangkok. Responding to appeals from Japanese residents, particularly Ishibashi Usaburō, Iwamoto campaigned in Japan for the establishment of a Japanese consulate. His lobbying contributed to the passage by the Japanese House of Representatives in February 1896 of a resolution calling for the establishment of a consulate in Siam. He subsequently attempted another ambitious economic undertaking, the Japan–Siam Trading Company (Nisshō Bōeki Kaisha), intended to mobilize Japanese capital for large-scale bilateral trade, but this project also collapsed following internal conflict among its organizers. Taken together, the three parts demonstrate the unexpectedly important role played by private Japanese individuals in the earliest phase of modern Japan–Thailand relations. Iwamoto’s commercial and migration ventures were largely unsuccessful in immediate economic terms. Nevertheless, their consequences extended far beyond business. The arrival of Japanese migrants created practical questions concerning legal status, consular protection, and diplomatic representation, thereby accelerating Japanese governmental involvement in Siam. The study therefore shows how unsuccessful private ventures could nevertheless function as catalysts for the institutionalization of interstate relations. By reconstructing these processes from multilingual and previously neglected primary sources, it offers a new perspective on the interaction among migration, private enterprise, consular diplomacy, and the formation of modern Japan–Thailand relations at the end of the nineteenth century.