https://news.docodemodouga.net/story.php?title=ocean-newsletter-%E7%AC%AC600%E5%8F%B7%EF%BC%882025-12-20%E7%99%BA%E8%A1%8C%EF%BC%89%EF%BD%9E%E7%89%B9%E9%9B%86%EF%BC%9A%E6%B0%97%E5%80%99%E5%A4%89%E5%8B%95%E3%81%A8%E6%B5%B7 発表元:海洋政策研究所、掲載日:2025-12-23 Tue, 23 Dec 2025 01:40:04 UTC en