
Tokyu Construction will adopt voice AI from NTT ConoSurf to digitize safety briefings.
Trials showed 100% of workers found it easy to use.
The company targets full rollout by fiscal 2027.
What happened
Tokyu Construction announced on August 31, 2026, that it will use NTT ConoSurf's voice AI and generative AI to digitize KY (hazard prediction) activities, with a pilot in fiscal 2026 and full rollout across all sites by fiscal 2027.
Why it matters
The move addresses issues where handwritten records lacked detail and were burdensome. In a trial from March to June 2026, the AI recorded and analyzed safety briefings, and workers rated the system highly for ease of use, with 100% confirming they would use it.
What to watch
The system, called SonoVo AI, automatically scores risk points and attention levels using an 'ABC assessment'. It also aims to reduce time for safety confirmations and support digital transformation across the industry, according to the company.
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The digitization of KY activities addresses a common problem: handwritten records were often incomplete and time-consuming to write, leading to missed details. By using voice AI to automatically record and transcribe safety discussions, Tokyu Construction aims to ensure accurate records and enable better analysis of hazards. The trial results suggest that workers find the system easier to use and that it encourages more careful attention to safety protocols.
The company plans to expand the system gradually, starting in fiscal 2026 and reaching all construction sites by fiscal 2027. This aligns with broader efforts to modernize construction site management through digital tools. While the article notes potential benefits like reducing time for safety confirmations and improving learning, it also mentions that some workers felt the AI might encourage over-reliance on its suggestions, missing details not in the manual. Overall, this move represents a step toward more efficient and data-driven safety management in construction.
For the industry, this adoption could signal a shift toward using AI not just for automation but for enhancing safety culture. The integration with other digital tools, such as DX (digital transformation) initiatives, suggests that construction firms are looking to leverage AI for more than just compliance—it may help in training and continuous improvement. However, the success will depend on how well the AI interprets nuanced conversations and whether workers fully trust its assessments.
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