Before the Tokugawa shogunate sealed Japan's borders under sakoku policy, the Dutch East India Company employed Japanese mercenaries to enforce colonial rule in the Maluku Islands. These fighters also participated in the Dutch conquest of the Banda Islands, where atrocities were committed against the local population by both the mercenaries and the VOC's own soldiers. One of Indonesia's earliest residents of Japanese descent emerged from this violent beginning: Saartje Specx, the daughter of Dutch colonial governor Jacques Specx, who ruled Batavia from 1629 to 1632. Her mother was Japanese. Saartje's life became one of colonial Batavia's most notorious scandals, but her very existence testified to the intimacy -- sometimes coerced, sometimes chosen -- between Japanese and Dutch-Indonesian worlds long before the modern era of migration.

By 1909, the Japanese community in Batavia had grown enough to warrant a consulate, though its population statistics were, by the consulate's own admission, haphazard. That year 782 Japanese migrants were registered, with an estimated 400 more uncounted. Medan reported 278 in 1910 -- of whom 221 were women, a ratio that reflected the karayuki-san trade. In the late 1920s, Okinawan fishermen began settling in North Sulawesi, drawn by rich waters rather than ideology. A small Japanese primary school opened in Manado; by 1939 it had eighteen students. The total Japanese population across Indonesia reached 6,349 by 1938. Then came the occupation. Between 1942 and 1945, the Imperial Japanese Army controlled the Dutch East Indies, building Shinto shrines -- eleven of them across the archipelago -- and reshaping the colony's infrastructure for war. What happened next was stranger than conquest.

When the Japanese occupation ended in 1945, roughly three thousand Imperial Japanese Army soldiers refused repatriation. They chose instead to fight alongside Indonesians against the returning Dutch colonists during the Indonesian National Revolution. About a third were killed; many of those who died are buried in the Kalibata Heroes' Cemetery in Jakarta, where their graves lie alongside Indonesian independence fighters. Another third remained permanently in Indonesia after the fighting ended, becoming citizens of a country they had occupied just years earlier. Not all of these soldiers were ethnically Japanese -- several prominent figures, including Li Baiqing and Chen Chih-hsiung, were Han Chinese from Taiwan who had served in the Imperial Army. In the 1960s, President Sukarno leveraged this wartime connection, asking Japan to provide scholarships for Indonesian students as both technology transfer and a form of reparation. Some of these students married Japanese partners, producing a generation of Indonesian Nikkei descendants.

The 1970s brought a different kind of migration entirely. Japanese electronics manufacturers began building factories across Indonesia, and with the factories came managers, engineers, and technical staff -- expatriates connected to corporate Japan rather than to any romantic notion of a second homeland. In Jakarta, clusters of Japanese businesses took root around Grand Wijaya Center and Blok M, where izakaya, supermarkets stocking imported products, and other establishments catered to a community that expected to go home eventually. By October 2009, some 11,263 Japanese expatriates lived in Indonesia. But migration also flowed in the other direction. In the late 1990s, Nikkei Indonesians from Sulawesi -- descendants of those Okinawan fishermen who had settled decades earlier -- began moving to Japan to work in the seafood processing industry. An estimated 1,200 settled in the small town of Oarai in Ibaraki Prefecture, carrying Indonesian-Japanese identity back across the ocean.

In Bali, the story takes yet another turn. The number of Japanese residents registered with the consulate in Denpasar grew from 43 in 1987 to 2,225 in 2010. The consulate processes roughly 100 marriage registrations annually, and over 90 percent involve Japanese women marrying Indonesian men. Some met their husbands while studying abroad; others came as tourists to Kuta or Ubud, returned repeatedly, and stayed. Scholars who have studied the phenomenon note that many of these women saw Bali not as an exotic destination but as a nostalgic one -- a landscape evoking an older Japan, quieter and less constraining than the cities they had left. The Daily Jakarta Shimbun, founded in 1998 by former Mainichi Shimbun bureau chief Yasuo Kusano, grew from 50 copies to more than 4,000, serving a readership that spans corporate expatriates, long-term residents, and the children of marriages that cross every boundary this migration history has drawn.