[目的/意义]从隐私风险评估与防控的角度，调查日本政府开放数据的隐私保护实践，为我国政府开放数 据和隐私保护提供参考。[方法/过程]利用文献调研和案例分析的研究方法，以日本为例，通过对文献资料和网站 内容的调查，获取一手资料阐述日本政府开放数据中隐私风险控制的经验，对日本个人隐私保护法律体系、政府 开放数据中个人隐私的评判标准、隐私风险应对的匿名化技术、隐私风险应对的机构与救济制度、隐私风险应对 的安全控制措施与认证机制进行分析和概况。[结果/结论]制定统一的《个人信息保护法》，就个人隐私范围、保障 措施等进行规范。在开放政府数据时，任命熟悉个人隐私保护的专家担任开放数据政策执行的管理者，以便于在 各个阶段能针对隐私保护具有周全的考虑。另外，在开放数据前，应当先去除数据的可识别性，将相关数据匿名 化，以避免对个人隐私的侵害。

[Purpose/significance] From the perspective of privacy risk assessment and prevention control，this paper investigates the privacy protection practices of government open data in Japan，in order to provide a reference for the development of policy of open data in China. [Method/process] Using the research methods of literature review and case analysis，this paper takes Japan as an example，accesses to the first-handed materials from literature and discusses the experience of government open data privacy risk assessment and prevention in Japan, analyzes and summarizes the legal system of personal privacy protection in Japan, the judgment criteria of personal privacy in government open data, anonymization technology which respond to privacy risk and related posts, institutions that address and relief system which respond to privacy risk, security and control measures and authentication mechanism which respond to privacy risk. [Results/conclusion] This paper put forward to formulate a unified personal information protection law to regulate the scope of personal privacy and safeguard measures. When opening government data, experts familiar with personal privacy protection should be appointed as managers of the implementation of the open data policy so as to have comprehensive consideration on privacy protection at all stages. In addition, before opening data, the identifications of data should be removed and related data should be anonymized to avoid the infringement of personal privacy.