Map of Japanese prefectures by HDI in 2017.
<a href="//commons.wikimedia.org/wiki/User:Allice_Hunter" title="User:Allice Hunter"><span style="font-family:Candara; color:blue;"> <i><b>Allice Hunter</b></i></span></a>
CC BY-SA 4.0
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Regions_and_Prefectures_of_Japan_no_labels.svg" title="File:Regions and Prefectures of Japan no labels.svg">Regions and Prefectures of Japan no labels.svg</a>