[kaishiro]

Being remarkably lazy, the idea of manually tagging so many images gives me hives. It'd be fun to try piping your collection through an image processing API, a la https://cloud.google.com/vision/, and seeing what comes out the other end. Could save you a bunch of time re: the tagging of items like "landscapes".

[rt2016]

I would absolutely prefer to not have to individually tag photos with high-level tags, but my limited search of desktop programs didn't surface any that were capable of machine vision to do it for me. I should have considered cloud solutions too, thanks for the suggestion!

[kaishiro]

Cool! Would love to hear how it turns out. I haven't done much more than just play with it on one off photos. Good luck!