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Evixar and Shachihata Announce Capital Alliance for Audio-Based Content Authentication
2026年03月13日
Press Release
March 13, 2026
Evixar Inc.
Shachihata Inc.
Evixar and Shachihata Announce Capital and Business Alliance to Develop Audio-Based Content Authentication Technology
Evixar Inc. and Shachihata Inc. announced that the two companies have entered into a capital and business alliance aimed at developing and promoting new technologies for verifying the authenticity of digital content. The partnership will combine Evixar’s expertise in acoustic signal processing and audio watermarking with Shachihata’s long-established trust brand to create solutions that help verify the integrity and authenticity of video and audio content.
In recent years, the rapid spread of generative AI has made it increasingly easy to create highly realistic synthetic media, including deepfake videos and manipulated audio. As a result, technologies that can verify the authenticity of digital content are becoming an essential part of the global information infrastructure.
Evixar has developed advanced audio signal technologies, including acoustic watermarking and audio fingerprinting, through its research and development in areas such as cinema accessibility and media synchronization. These technologies are now being applied to new fields including content authentication and countermeasures against misinformation.
Shachihata, widely known for its trusted seal and stamp brand in Japan, has been expanding its business into digital trust services. Through this partnership, the company aims to extend its long-standing concept of “trust through marking” into the digital domain.
Together, the two companies will develop solutions that embed authentication information into audio signals, enabling reliable verification of media authenticity even after content has been distributed across various digital platforms.
The collaboration also seeks to contribute to emerging global standards for content authenticity, including initiatives related to the Coalition for Content Provenance and Authenticity (C2PA), which aims to establish a framework for verifying the origin and integrity of digital media.
Building Audio-Based Content Authentication Technology Selected by Japan’s Ministry of Internal Affairs and Communications
Furthermore, Evixar has been selected for two consecutive years (FY2024 and FY2025) for the Ministry of Internal Affairs and Communications' "Development and Demonstration Project for Countermeasure Technologies against Online Disinformation," and will exhibit at the results dissemination event in Tokyo on March 16.
Shachihata's Planned Content Origin Certificate: "SIGNED SOUND"
Shachihata plans to subscribe to Evixar's third-party allotment of shares, investing 110.55 million yen in mid-March. This will give Shachihata a 6.58% stake, making it the third-largest shareholder. Shachihata will encourage client companies to adopt the content protection service, leveraging its expanding digital trust business, which has surpassed 1.1 million implementations of its Shachihata Cloud electronic seal, approval, and contract system. Backed by this track record, Shachihata will receive C2PA certification and issue the "SIGNED SOUND" origin certificate. Obtaining the international standard "ISO/IEC27001" for solution management and operation for Shachihata Cloud will also be advantageous.
Meanwhile, Evixar will accelerate development with specifications compliant with C2PA. The company has already distributed seven of the Kyoto Prefectural Governor's press conferences on YouTube between October and November 2025, embedding acoustic watermark information indicating "Kyoto Prefecture Official" with the prefecture's cooperation. This demonstration confirmed the practicality of introducing a reliable system for official information without heavily burdening daily administrative tasks. Evixar is also beginning partnership discussions with major Taiwanese telecommunications carrier ChungHwa Telecom to jointly verify the technical challenges and effectiveness of applying real-time audio watermarking technology as an anti-fraud measure on international communication infrastructures. Furthermore, they have demonstrated effectiveness in a test environment for content distributed on the IP radio service "radiko," proposing benefits for improving broadcast reliability and protecting creators' rights.
How the Content Protection Service Works
In Evixar's system, users register and log in to a web-based platform. When video data is uploaded, the system embeds an electronic watermark into the audio and generates acoustic fingerprint data from it. The watermarked material can then be downloaded and distributed across various media.
If a suspicious video becomes a trending topic on social networking services (SNS), it can be downloaded and uploaded to the system for watermark detection and fingerprint matching. If neither the watermark nor the fingerprint matches, it can be identified as a video generated by AI. (Evixar's technology is also utilized in barrier-free cinema screenings, such as "HELLO! MOVIE" and "Subtitle Glasses".)
Track Record in Other Fields
Cross-film-industry operation of a standardized acoustic fingerprint (audio feature point) database and accessibility services ("HELLO! MOVIE", "Subtitle Glasses") in Japan.
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(The above infographic was created by AI)
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