I was asked to work on “finding data linking latitude/longitude with municipalities,” so I’ll introduce what I researched.

There were already predecessors who had done similar things, so I referenced the following articles:

• 国土交通省のデータを使って、緯度経度から市区町村までを取り出す - Qiita
• 総務省のデータを使って、緯度経度から市区町村の何丁目までを取り出す - Qiita

You can download it from the Ministry of Land, Infrastructure, Transport and Tourism’s “Location Reference Information Download Service”.

That’s all from the Gemba.