Case Study: NTT’s Pioneering AI Initiatives

Nippon Telegraph and Telephone Corporation (NTT) is harnessing the power of AI to innovate in various domains, including fraud detection, healthcare, and energy, while also pioneering in the development of a large-scale language model (LLM) and generative AI for corporate use. Through strategic partnerships, cutting-edge technology, and industry-specific applications, NTT is not only addressing social issues but also setting new standards in AI development and application, positioning itself as a leader in the global AI landscape.

Key Takeaways

  • NTT has developed an AI system in collaboration with Saitama prefectural police to detect telephone fraud, demonstrating the practical application of AI in enhancing security and safety.
  • The company is launching a power-efficient LLM named “tsuzumi,” aiming to offer a sustainable and cost-effective solution for generative AI, with a focus on Japanese language processing.
  • By tailoring its AI technologies to specific industries, NTT is reducing operational costs and energy consumption, addressing the challenge of environmental sustainability.
  • NTT’s AI-powered anomaly prediction technology, initially designed for telecom networks, is being adapted for early detection of equipment anomalies in experimental fusion reactors, showcasing the versatility of its AI applications.


NTT’s approach to AI encompasses a blend of innovation, strategic partnership, and focus on sustainability. The company leverages its longstanding expertise in natural language processing and telecommunications to develop AI solutions that are both advanced and practical. By collaborating with law enforcement agencies, NTT demonstrates its commitment to societal safety through the application of AI in fraud detection. Moreover, the development of “tsuzumi,” a large-scale language model, illustrates NTT’s dedication to creating AI that is both powerful and energy-efficient. This model is designed to serve specific industries, thereby minimizing unnecessary resource consumption and making AI more accessible and cost-effective for corporate clients.


In the realm of AI implementation, NTT has embarked on a multifaceted journey that underscores its commitment to innovation and societal betterment. The company’s initiative to combat telephone fraud through AI technology exemplifies a direct application of AI in enhancing public safety. By installing AI-equipped devices in households, NTT has introduced a proactive mechanism to identify and alert against potential frauds, effectively bridging the gap between advanced technology and everyday use. This system not only automatically flagged suspicious calls for immediate attention but also facilitated a rapid response network by connecting with family members and relevant institutions, thereby creating a community-based defense mechanism against fraud.

Furthermore, the development and deployment of the “tsuzumi” large-scale language model mark a significant milestone in NTT’s AI implementation strategy. This initiative showcases the company’s foresight in recognizing the importance of industry-specific AI solutions. By focusing on the Japanese language, NTT addresses a critical need for localized AI services, thus providing a tailored approach that significantly enhances operational efficiency and effectiveness in sectors such as healthcare and insurance. The trial operations at Kyoto University Hospital and within Tokio Marine & Nichido Fire Insurance Co.’s call centers serve as testament to the practical applicability and potential impact of NTT’s AI technologies, demonstrating how customized AI can lead to improved service delivery and decision-making processes.

On another frontier, NTT’s adaptation of its AI-powered anomaly prediction technology for use in experimental fusion reactor equipment epitomizes the innovative application of AI in critical and complex domains. This technology, initially designed for telecom networks, has been re-engineered to predict equipment anomalies in fusion reactors, highlighting NTT’s capability to repurpose its AI solutions for diverse challenges. Such an approach not only extends the lifespan of expensive and sensitive equipment but also contributes to the global quest for sustainable energy sources. Through these implementations, NTT demonstrates a holistic and forward-thinking approach to AI, underscoring its potential to drive technological advancement across various sectors while addressing key societal and environmental issues.


The results of NTT’s AI initiatives are promising. The telephone fraud detection system successfully alerted participants of fraudulent activities, showcasing the potential of AI in crime prevention. The “tsuzumi” model, with its emphasis on cost and energy efficiency, is poised to revolutionize the use of generative AI in Japanese language processing and beyond. Additionally, the application of AI in anomaly prediction for fusion reactors represents a significant step towards safer and more reliable energy production.

Challenges and Barriers

Despite its successes, NTT faces challenges in AI development and implementation. The primary obstacles include ensuring the privacy and security of data, reducing the environmental impact of AI operations, and overcoming the technical complexities of developing highly accurate and reliable AI systems. Additionally, the need for continuous innovation to stay ahead of rapidly evolving AI technology and market demands poses a persistent challenge.

Future Outlook

Looking ahead, NTT is poised to further its leadership in the AI domain by expanding its range of AI services, improving the efficiency and effectiveness of its technologies, and exploring new applications in various industries. The company’s commitment to sustainability, combined with its innovative approach to AI development, sets a promising path for the future, where AI not only drives business growth but also contributes to solving societal challenges.

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