2025 年 107 巻 p. 73-91
This study aims to explore the methods of media lifespan research, focusing on planned obsolescence. The reasons for exploring planned obsolescence are explicated, and discussion on planned obsolescence is summarized. Next, the current state of digital media is examined and the need to focus on “quality” apart from “desire” is highlighted. Based on this, a three-step method for media lifespan research is proposed. The first step involves the development of a digital archive; the second is about media archaeology, focusing on media art; and the third pertains to design history research, linking media lifespan to the cultural history of materials. Finally, this study proposes media lifespan as a new research topic in media studies.