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Tokyu Construction to roll out voice AI for safety checks by 2027

Tokyu Construction to roll out voice AI for safety checks by 2027

Key takeaway

  • 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.

3 Key Points

  1. 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.

  2. 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.

  3. 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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Context & Analysis

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.

FAQ

What is KY activity?
KY (hazard prediction) activity is a pre-work safety check where workers discuss potential dangers before starting tasks. Tokyu Construction is digitizing the recording and analysis of these briefings using AI.
How does the AI system work?
The AI (SonoVo AI) transcribes and stores voice records from safety briefings, then analyzes them with generative AI to assign ABC ratings for risk points and attention levels. It also suggests caution points based on the content.
What were the trial results?
In a trial from March to June 2026 at a Tokyo construction site, workers reported 100% ease of use. Five of seven workers said they would pay more attention to safety because of the ABC ratings.
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