Well it makes me feel a little better that you knew the futility of it before you posted, but still, I can't help but feel empathetic. It's just kinda depressing to see someone dish out so many hours of productive activity knowing that the people that can do something with it (devs) aren't going to. It's hard not to imagine how much time and effort you put into it, and then remember how much the dev team ignores the English-speaking community even on smaller great ideas that DO get translated and sent their way.
But yeah, hope you had fun with it, at least. There are lots of bits and pieces that are definitely fodder for great future content. You might want to cherry-pick some of the best ideas and have someone translate them for you so they can go on the JP forums. If it generates enough buzz from their community there's a chance, albeit slight, that the devs will at least take a look.
I'd stay away from presenting anything suggesting new jobs, though, as I'm sure they see as many of those kinds of ideas on the JP forums as we see here, and there's pretty much no chance at new jobs at this point in the game.