Japan doesn’t have street names except for a very very few, so in the past when someone would give you directions, they would make you a map and add details for where to turn (e.g. house with blue roof and a dog).
Houses do have numbers though and there’s a code used by mailmen, so that also helps.
I do hate color themed icons. I understand why someone else might like it, but it makes it hard to find what I’m looking for and some of the icon designs are bland and uninspired.