This document summarizes Japan's three territorial issues - Northern Territories, Senkaku Islands, and Takeshima Island. For each issue, it outlines the past, present, and potential future approaches and status of negotiations between Japan and the other claimant states (Russia for Northern Territories, China for Senkaku, South Korea for Takeshima). Key events and diplomatic discussions are mentioned for historical and current context. The future sections suggest potential negotiation strategies and confidence building measures for each ongoing territorial dispute.