Oh cool. I'm in Koenji. If you would like more of this kind of thing, I highly recommend Tae Kim's Guide to Japanese Grammar. It's a lot like OP's article, but

Oh cool. I'm in Koenji. If you would like more of this kind of thing, I highly recommend Tae Kim's Guide to Japanese Grammar. It's a lot like OP's article, but much more thorough, organized by topic, and provides auxillary resources so you can dig in as much as you please.