Enabling advanced AI data utilization while ensuring privacy through computation on encrypted data 

Nagoya, Japan, July 16, 2025 

Acompany Co., Ltd. (Headquarters: Nagoya, Aichi Prefecture; CEO: Ryosuke Takahashi; hereinafter “Acompany”) and KDDI Corporation (Headquarters: Minato-ku, Tokyo; President & CEO: Hiromichi Matsuda; hereinafter “KDDI”) announced today that they have entered into a partnership to develop and provide technology that enables safer and more advanced use of big data, including personal and location information (hereinafter “the partnership”).

In recent years, the utility of customer attributes, purchase histories, and location data has increased in fields such as finance, healthcare, education, and marketing. However, broader use of such data demands strict privacy protection. At the same time, risks such as personal data leaks and privacy violations due to cyberattacks are becoming more pronounced.

Acompany reduces these risks through the provision of confidential computation technology that enables advanced data analysis while keeping the computation process itself secure. Since 2023, the two companies have been collaborating on the development of data clean rooms - secure environments for data sharing between multiple enterprises, compliant with personal information protection laws - centered on secure computation technology. The technology was commercialized in March 2025.

Through this partnership, both companies aim to further advance privacy-preserving inter-company data collaboration and the safe and responsible use of AI technologies.

Partnership Details

1. Development of Privacy-Preserving Technologies to Enhance Data Utilization Safety

Acompany brings deep expertise in privacy and AI governance as well as in confidential computation and security technologies. KDDI, leveraging its extensive big data from services such as telecommunications and finance and its AI development capabilities, will collaborate with Acompany to develop privacy-preserving technologies. These will serve as the foundation for constructing AI systems and large language models that utilize data securely.

The companies will offer secure data-sharing technology to domestic and international enterprises requiring safe inter-company data collaboration, helping solve complex challenges and generate new value.

2. Strengthening and Promoting Privacy Governance

As AI technologies rapidly evolve, appropriate responses based on trends in privacy protection and use case studies are essential. Acompany’s expertise in privacy governance will support KDDI in enhancing privacy protection governance across the entire KDDI Group.

In addition, through the activities of the PrivacyTech Association, for which Acompany serves as the secretariat, the companies aim to promote the benefits of privacy-enhancing technologies and contribute to the realization of a society where data can be used safely and securely.

Comments on the Partnership

Hiroko Murata, General Manager, DX Design Division, Personal Business Sector, KDDI Corporation:

"At KDDI, we are pursuing a vision of data collaboration to create new value by connecting companies through data, benefiting both customers and society. This partnership with Acompany will help expand secure data utilization while protecting privacy, supporting the broader advancement of sophisticated AI applications. Together, we will strive to achieve a prosperous future society that balances safety and innovation through a privacy technology foundation co-developed by both companies."

Ryosuke Takahashi, CEO of Acompany Inc.:

"We are thrilled to announce this partnership with KDDI. Our journey toward safe personal data use began nearly two years ago, and this partnership is a significant step forward toward fulfilling our mission: 'Trust. Data. AI. / Building trust in all data and AI use.'

Through this collaboration, we will develop security technologies to improve data operation safety and, leveraging our strengths in privacy and AI governance, work with KDDI to establish company-wide governance for secure data utilization.

By using KDDI as a model case, we aim to contribute to the creation of a trustworthy data-driven society on a global scale."

About KDDI

In May 2022, KDDI formulated its long-term vision, KDDI VISION 2030: "The creation of a society in which anyone can make their dreams a reality, by enhancing the power to connect." Based on this vision, its medium-term business strategy (FY2022–FY2025) promotes the "New Satellite Growth Strategy," which focuses on 5G communications, data-driven approaches, and generative AI as core businesses. It also includes two strategic business domains:

Orbit 1: DX (Digital Transformation), Finance, Energy

Orbit 2: Mobility, Space, Healthcare, Web3 & Metaverse, Sports & Entertainment

KDDI aims to achieve further business growth and enhance corporate value through sustainability-focused management, strategic expansion, and strengthened management foundations in collaboration with its partners.

About Acompany

Acompany is a startup committed to the mission: "Trust. Data. AI. / Building trust in all data and AI use." It specializes in privacy-enhancing technologies (PETs) such as secure computation and privacy governance. Acompany is recognized for its achievements, including a co-authored research paper with Intel in May 2025 on secure computation infrastructure.

Through this partnership, Acompany will support safe data collaboration and utilization within the KDDI Group using secure computation, aiming to achieve both consumer protection and inter-company collaboration.

Company Overview

Company Name: Acompany Co., Ltd.

CEO: Ryosuke Takahashi

Headquarters: Nagono Campus, 2-14-1 Nagono, Nishi-ku, Nagoya, Aichi, Japan

Established: June 2018

Website: https://en.acompany.tech/

Business Areas: Provision of products and technologies related to confidential computing, and consulting services for secure data utilization.

Inquiries

For more information, please contact:

Contact Form: https://en.acompany.tech/contact/