Digital End-of-Life Planning App "SouSou" Surpasses 10,000 Members

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.

Issues such as "families being unable to find information after death" and "the existence of contracts not being communicated" are beginning to become common themes for many companies.

Changes in Seniors

Internet usage among seniors is increasing year by year, and the means of gathering information about end-of-life planning are also changing significantly.

The premise that "ending notes are paper-based" is also gradually beginning to change.

From "Leaving" to "Delivering" End-of-Life Planning

For a long time, the central theme of end-of-life planning has been "what to leave behind."

However, in today's digitalized world, simply leaving information is no longer sufficient.

Much of our important information, such as online banking, subscriptions, insurance contracts, photos, and social media, exists digitally.

Therefore, what is needed is not just "leaving things behind," but "a system to reliably deliver them to the right people at the right time."

"SouSou" provides a system that connects the wishes of the individual to their family and businesses through identity verification using the My Number card, digital death verification, and information linkage with partner businesses.

As a Pillar of Social Infrastructure Supporting End-of-Life Planning

On June 23, 2026, the initiatives of "SouSou" were featured on TV Tokyo's "World Business Satellite (WBS)."

Furthermore, collaborations with various businesses involved in end-of-life planning, such as insurance, funerals, memorial services, and telecommunications, are expanding.

End-of-life planning is evolving from an individual endeavor to a theme that society as a whole supports.

SouSou aims to create an environment where everyone can entrust their wishes with peace of mind, serving as a pillar of this social infrastructure.

A Message from the Representative

More than the number of 10,000 members, I feel that societal awareness regarding end-of-life planning is beginning to change.

As life's information becomes digitized, the challenge of "how to reliably connect one's final wishes" will become increasingly important.

We are committed to building a social infrastructure that allows people to entrust their wishes to the future with peace of mind, aiming to minimize procedural burdens and maximize time for remembrance.

Kazusa Kusaka, Representative Director

What is the Ending Platform "SouSou"?

"SouSou" is a new digital end-of-life planning service that utilizes the My Number card. It offers various functions necessary for end-of-life planning, such as ending notes, completely free of charge through the app, all in one place. It also features three unique characteristics not found in conventional services: "1 Guarantee of Identity/Authenticity," "2 Digitalization of Death Verification," and "3 Linkage with External Services (Data)." In the future, through collaboration with various partner companies, we aim to automate and simplify various procedures after death.

- "SouSou" Service Introduction Page: https://sousou-official.com/service-page

- "SouSou" Introduction Video: https://youtu.be/FwH7Qk-LVJM?feature=shared

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About Sousou Inc.

Sousou Inc. was founded in August 2022 with the mission to "give form to blessings." The founder and Representative Director, who had been involved in many digital technology projects at a major consulting firm following the death of his father, is developing the ending platform "SouSou" (smartphone app) to provide a "new life-ending experience achievable through digital technology." We aim to further expand our services through business partnerships with diverse companies in fields such as digital technology and end-of-life services.

Corporate Site: https://sousou-official.com/

Contact for Inquiries Regarding This Matter

Sousou Inc.

Contact: Shimaya

E-mail: sousou-corporate@sousou-official.com

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