SouSou, an end-of-life planning app provided by Sousou Inc. (Headquarters: Kawaguchi City, Saitama Prefecture; Representative Director: Kazusa Kusaka; hereinafter referred to as "the Company"), surpassed 10,000 members on June 20, 2026 (Sat). In recent years, against the backdrop of Japan's aging society with a high death rate, the environment surrounding end-of-life planning has been undergoing significant changes. With legislative reforms including the establishment of a digital will system, growing interest in digital assets, and an increase in related services and research, "end-of-life planning" has become a topic of discussion not only as life's final arrangements but also as a societal issue in the digital age. Against this backdrop, "SouSou" has been used by many people, surpassing 10,000 members in approximately 1 year and 4 months since its service launch. "Digital End-of-Life Planning" Progressing Throughout Society In recent years, movements surrounding end-of-life planning have significantly accelerated. Changes in Systems On June 17, 2026, amendments to the Civil Code were enacted, including the establishment of a new will system that can be created on personal computers and smartphones (the so-called "digital will"). It is scheduled to come into effect within three years of its promulgation. This marks a historic turning point in the field of end-of-life planning, as the will system, which has centered on "handwritten" wills since the Meiji era, will be significantly reviewed, including methods for identity verification. Changes in Media National newspapers have featured series on the "society with a high death rate," and end-of-life planning is being covered in films and other media, indicating that it is no longer a topic for a select few but a challenge that society as a whole is beginning to consider. Changes in Corporations There has been a succession of press releases and service developments related to digital assets and online contracts. Issue