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JapanPublic sector2023 – ongoing

Nagano Prefectural Government

Copilot and generative AI for administrative work

Nagano's governor reported that about 25% of prefectural staff used Copilot

In progressCompany's own claim

Problem

Nagano wanted to reduce administrative workload while setting rules for the risks of generative AI.

Approach

The prefecture began generative AI trials in May 2023 and started full operation in January 2025 after establishing guidelines. In April, the governor reported staff use of Microsoft Copilot. He also described AI transcription, data analysis and assistance with RPA programming.

Results

~25%share of staff using the prefecture's Microsoft Copilot, reported by the governor in April 2025Company's own claim[1]

Takeaway

The adoption figure measured staff use. Nagano did not provide measured time savings in the governor's April account.

Categories

Innovation type
Process innovation
AI technology
Generative AI
Evidence
Company's own claim

Sources

  1. 知事会見2025年4月18日
    Nagano Prefectural Government18 Apr 2025Government publication
  2. 知事会見2025年1月10日
    Nagano Prefectural Government10 Jan 2025Government publication

Source summaries

[1]Nagano Prefectural Government18 Apr 2025

The governor reported approximately 25% staff adoption of Copilot. He described administrative uses and called for wider use with continued attention to risks.

[2]Nagano Prefectural Government10 Jan 2025

Nagano announced full operational use of generative AI. The governor dated the preceding trials to May 2023 and explained the introduction of usage guidelines.

Full details are in the original sources.

Added 1 Nov 2026 · Updated 1 Nov 2026
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