2016年日本通過宇宙2法，揭櫫推動民間升空商機、遙測數據商業等目標，目的在於擴大日本太空商業活動與世界太空市場接軌。其次，2017年美國NASA公布「阿緹米斯計畫」（Artemis program），基於美日同盟和美日安保，日本也積極參與美國主導的月球計畫；日本第5期《宇宙基本計劃》（2023∼2033年）表明日本邁入國際太空合作的動向，並且推出「宇宙安全保障構想」。就此，本文整理日本對應新太空時代的動向、太空與安保、太空民主聯盟等觀點，採用理性抉擇理論的「偏好—機..

In 2016, Japan passed the Space Act which aims to promote private space launch opportunities and the commercialization of remote sensing data, with the goal of expanding Japan’s space commercial activities and aligning with the global space market. Secondly, in 2017, NASA announced the Artemis program (Lunar Program). Based on the U.S.-Japan alliance and U.S.-Japan security arrangements, Japan is also actively participating in the U.S.-led lunar program. The 5th Basic Plan for Space Policy (2023~2033) indicating Japan’s move tow..

現代科技日新月異，人類的太空活動也展現迥異於以往的面貌。太空科技不僅延伸到宇宙，另一方面也深入地表影響人類生活，諸如衛星傳送、新創產業、軍事技術等。連結虛擬和現實的宇宙空間，現行國際法必須處理嶄新議題的太空垃圾、太空國際法制化、太空資產保護等。同時間，從太空發射的低軌衛星訊息傳送、氣象觀測、衛星遙測等，也與一國內的太空法規範息息相關。這些都挑戰目前主權國家在國際社會的行為，以及在國內制定太空政策的想像。本文取日本太空發展之例，從公共財理論的概念分析太空集體財和私有財的內涵。發現由於太空的..

Modern technology is advancing with each passing day, and human space activities are also showing a completely different appearance from the past. Aerospace technology not only extends to the universe, but also profoundly affects human daily life, such as satellite transmission, emerging industries, and military technology. In order to regulate these human activities in space, the current international law must deal with new issues such as space junk, international legalization of space, and protection of space assets. At the same time, low..