SouSou operates a free smartphone app that functions as a digital ending-note and end-of-life platform, using My Number card-based identity verification to create verifiable "life-ending data." The product secures both confirmed user intent and automated death detection, then links necessary data to partner services under explicit user consent. Its life-ending data is generated through three steps: identity-verified intent registration, system detection plus administrator confirmation of death, and secure, auditable external-service connections. The company plans to accelerate social implementation of its "end-of-life infrastructure" by partnering with firms in communications and payments to automate postmortem procedures. Recent fundraising (pre-Series A second close) contributed approximately ¥30 million and pushed cumulative funding past ¥300 million, supporting feature expansion, marketing, new partnership-driven services, and hiring.

Total raised

$0M

Funding rounds

1

Latest round

Series A

Latest activity

Sep 2025