日本执政党自民党正考虑扩大无主或权属不明离岛的国有化范围，并计划将相关目标纳入即将举行的众议院选举政纲。该议题将由自民党一个负责研究外国人在日本居住及不动产取得问题的工作组讨论，背景是选前强化对领土与安全议题的关注。

政策重点在于靠近日本海域边界的偏远岛屿，尤其是所有权不明确的区域。支持者认为，系统性确认并国有化这些岛屿，有助于更清楚掌握日本领土现状、加强管理能力，并降低潜在的法律与安全风险。这一做法被视为现有政策的延伸，而非全新方向。

日本此前已有类似先例。2017年，日本政府一次性将273个偏远岛屿收归国有，这些岛屿对界定日本领海和专属经济区具有基础性作用。近年来，围绕国家安全的讨论推动部分政界人士呼吁，不应仅限于边境岛屿，而应进一步扩大国有化对象范围，以强化对全国离岛的长期控制与治理。

Japan’s ruling Liberal Democratic Party is considering expanding the nationalization of outlying islands with unclear ownership, and plans to include the goal in its platform for the upcoming lower house election. The issue will be examined by an LDP working group focused on policies related to foreign residents and property acquisition, reflecting heightened attention to territorial and security issues ahead of the vote.

The proposals focus on remote islands near Japan’s maritime borders, particularly those with unidentified owners. Advocates argue that identifying and nationalizing such islands would clarify the status of Japanese territory, strengthen management, and reduce legal and security risks. The move is framed as an expansion of existing policy rather than a new initiative.

Japan has precedent for such actions. In 2017, the government nationalized 273 remote islands that serve as a basis for defining the country’s territorial waters and exclusive economic zone. Since then, security-driven debates have led some policymakers to argue that nationalization efforts should extend beyond border islands to reinforce long-term control and governance of outlying territory.