岸田政権は「4島返還」へ回帰か – NEXT MEDIA “Japan In-depth” http://okane.robots.jp/2022/01/16/%e5%b2%b8%e7%94%b0%e6%94%bf%e6%a8%a9%e3%81%af%e3%80%8c4%e5%b3%b6%e8%bf%94%e9%82%84%e3%80%8d%e3%81%b8%e5%9b%9e%e5%b8%b0%e3%81%8b-next-media-japan-in-depth/