Because Japan is fun and the food is good.

Also Japan is just about the most photographical country I've ever been to.

Not OP, but besides the work culture, there is also the actual work. Which you can love doing :)

I have friends and family working in Japan and requiring a stamped slip for metro delay (not sure if it's still stamped or just printed) is just a cultural thing everywhere, or so I'm told.

That kind of tradition means a lot more to Japan society than it does for some Western countries, I suppose. You can search for articles on "Japanese corporate bureaucracy" for different perspectives.

And appeal to tradition is a logical fallacy

There is more to a job than the culture?

Depends on if you are working in a big corporation or no.