| Abstract |
Immigration (gaikokujin-ukeire) was a de-politicized issue in Japanese elections for a long time. This changed after the 2024 general election, when Sanseito, an anti-immigrant right-wing party, mobilized voters through nativist appeals and subsequently expanded its electoral support in the 2025 and 2026 elections. This development raises two related questions: To what extent did Sanseito itself drive the politicization of immigration, and how did the established parties’ response contribute to this process? More broadly, how has interparty competition over the politicization of immigration evolved in Japan?
Existing studies of immigration politics in Western Europe often identify anti-immigrant parties as issue entrepreneurs that can activate immigration as an electoral issue. Other studies suggest that established right-wing parties play a pivotal role in activating or amplifying politicization. The Japanese case provides an opportunity to examine whether patterns identified in Western Europe also emerge in a markedly different political and social context, where immigration had long remained weakly politicized.
Japan's immigrant population remains relatively small compared to many established democracies, and the Liberal Democratic Party (LDP), the country's dominant center-right party, has long maintained that Japan has never formally adopted an immigration policy. At the same time, the LDP gradually expanded admission of foreign workers under the Abe government after 2012 despite its conservative stance on immigration.
Using party manifestos and candidate surveys, I examine changes in the salience of and positions on immigration issues, focusing on the LDP. My preliminary analysis suggests two findings. First, Sanseito's electoral success led the LDP to slightly increase references to immigration in its 2026 manifesto. Second, LDP candidates took more restrictive positions on the issue in the 2026 election. In other words, the LDP responded to Sanseito's politicization challenge through a limited accommodative strategy. The implications for Japanese politics and the politics of immigration will be discussed.
| Date & Time |
u:japan lecture | s13e01
Thursday 2026-10-08, 18:00~19:30 (CET, UTC +1h)
| Place |
| Platform & Link |
https://univienna.zoom.us/j/63134335597?pwd=CvjHiCaQ1sUXuuZwQuDiU4fEJrXGbl.1
Meeting-ID: 631 3433 5597 | Passcode: 652997
| Further Questions? |
Please contact ujapanlectures.ostasien@univie.ac.at or visit https://japanologie.univie.ac.at/ujapanlectures/s13/#e01.

