Japan has taken a significant step into the digital age with the passage of sweeping Civil Code amendments that, for the first time, allow wills to be created electronically. The reforms, approved by the House of Councillors on June 17, 2026, mark a historic shift in how legal documents can be prepared in Japan, with particular implications for the country's foreign resident population. According to NHK, the amended Civil Code was passed with majority support in the upper house plenary session. While the legislation primarily focuses on overhauling the adult guardianship system for individuals with dementia and other cognitive impairments, it also introduces provisions for digital wills—a development that Yahoo Japan reports as a groundbreaking addition to Japanese inheritance law. Under current law, Japan recognizes several types of wills, including handwritten (jibun) wills and notarized wills, all requiring physical documentation. The new digital will provision represents the first time Japanese law has permitted testamentary documents to be created and stored electronically, potentially simplifying estate planning for tech-savvy residents. For foreign residents in Japan, this development carries particular significance. Many expats maintain assets both in Japan and their home countries, making estate planning complex. The traditional requirement for handwritten wills—which must be entirely written by hand, dated, and signed by the testator—has posed challenges for those unfamiliar with Japanese legal customs or uncomfortable writing extensively in Japanese. While specific implementation details have not yet been fully disclosed, the legalization of digital wills is expected to provide greater flexibility in estate planning. Digital formats may allow for easier updates and modifications compared to handwritten documents, which must be completely rewritten to incorporate changes. This could prove especially valuable for expats whose circumstances frequently change due to job relocations or evolving international asset portfolios. However, foreign residents should approach this development with measured expectations. Japanese inheritance law remains complex, particularly for international estates. The Civil Code's forced heirship rules, which guarantee certain family members a portion of an estate regardless of the will's contents, continue to apply. Additionally, questions remain about how digital wills will be authenticated, stored, and accessed after death—critical considerations for anyone planning to utilize this new option. The amendments also substantially revise Japan's adult guardianship system, which affects how financial and personal decisions are made for individuals who lose mental capacity. These changes may impact expats with aging family members in Japan or those planning their own long-term care arrangements. Experts anticipate that the Justice Ministry will issue detailed guidelines on digital will requirements before the provisions take effect. These regulations will likely address technical standards, security measures, and authentication procedures necessary to ensure digital wills meet legal validity requirements. For now, foreign residents considering estate planning in Japan should consult with legal professionals familiar with both Japanese inheritance law and international estate issues. While digital wills may eventually offer a more accessible option, traditional will formats remain valid and may still be preferable depending on individual circumstances. The passage of these amendments reflects Japan's broader push toward digitalization of government services and legal processes, following recent initiatives like digital residency certificates and online administrative procedures. As implementation details emerge in coming months, expats should monitor announcements from the Justice Ministry and consider how these changes might benefit their personal estate planning strategies. Until specific regulations are published, those needing to create or update wills in Japan should continue using established legal methods while staying informed about upcoming digital options that may soon provide greater flexibility and convenience.