JapanReal estate2023 – ongoing

Nippon Kanzai Holdings

In-house GPT chatbots (NK-AIbot, NK-AIbot-D1) for group staff

Nippon Kanzai's group staff used an in-house GPT chatbot more than 30,000 times in five months

In progressCompany's own claimOfficial ↗

Problem

Staff at the building-management group needed help with drafting, summarizing and finding answers in internal manuals and proposals. Public AI services raised data-handling concerns.

Approach

The group launched NK-AIbot on GPT-3.5 in June 2023 and moved it to GPT-4 in August 2023. It ran in a dedicated Microsoft cloud environment, and stored data was not reused for other purposes. In December 2023 it added NK-AIbot-D1, which combines full-text search with GPT so staff can query operations manuals and proposal documents.

Results

30,000回以上total uses across the group in the five months after the June 2023 launch, per the companyCompany's own claim[1]

一日あたり平均約350回average uses per day over the same period, per the companyCompany's own claim[1]

Takeaway

Usage counts show adoption, not business impact. The company reported no time or cost savings in this release.

Sources

日本管財グループ、独自生成AIに自社データの活用機能を追加した「NK-AIbot-D1 Powered by GPT-4」の導入を開始
Nippon Kanzai Holdings (press release via Zaikei)4 Dec 2023Company publication

Source summaries

[1]Nippon Kanzai Holdings (press release via Zaikei)4 Dec 2023

The company announced NK-AIbot-D1, an upgrade that lets staff query internal data with GPT-4. It said the chatbot had been used over 30,000 times across the group in five months, about 350 times a day. It also listed the June and August 2023 launches of the earlier versions.

Full details are in the original sources.

Added 2 Nov 2026 · Updated 2 Nov 2026