Here's a really great implementation of Web GIS for Crime Information Maps for Tokyo Metropolitan City by Esri Japan. It is a portal that shows several crime themed maps meant to encourage crime prevention.
Some general information and background can be found on this website in english,
The ArcGIS Online landing page is here: https://bouhan-tokyo.maps.arcgis.com/home/index.html
It is in Japanese, but you can open in Chrome and translate the page contents to check it out for yourself.
List of beautiful interactive maps from left to right in the featured gallery:
1 "子供の安全マップ" - Child Safety Map
2 "特殊詐欺情報マップ" - Special Fraud Information Map
3 "町丁字別犯罪情報マップ" - Crime Information Map by Town District
4 "防犯団体活動情報マップ" - Crime Patrol Community Volunteer Map
5 "施策情報マップ" - Crime Prevention Measures and Policies Map
6 "放置自転車情報マップ" - Abandoned Bicycle Information Map
Many of the web apps were built using Web AppBuilder for ArcGIS, and in some instances also nested in a Map Series template.