If you’re interested, I made this list a long time ago of every single train station in Japan, and what level you need to be in WaniKani before you’ve learnt all the kanji. (And also prefectures, cities, towns, villages, and the 5000 most-common family names.)
Small caveat, though: it’s been a while since I last updated the kanji list, so it might no longer be entirely accurate. I guess that’s a fairly easy fix, mind - just gotta get around to it. Also possible that they’ve opened new stations.