Memrise.com is good for learning vocabulary. The Japanese section also has a few audio-only courses for “getting used to Japanese”. They’re neat.
For writing, there’s lang-8, really, unless you also want to start a Japanese journal on WordPress or something.
If you think you can get through one (I can’t; too boring and I already know most of the basic stuff in them) you could get an audio-only course. For that, you’ve got Michel Thomas (British) and Pimsleur (American), as well as Assimil (originally French, but the English version is just as good). Personally I prefer Assimil’s way of teaching; it’s much less boring than the other two, BUT it doesn’t work for everyone and can be really expensive/hard to find unless you, ahem, know where to look. The other two are generally cheaper and much easier to find. I prefer Michel Thomas, but honestly both are just as boring. If you want to use either, listen to the first few lessons of both before you decide what to get.

Edit: forgot to mention that Assimil also has a textbook and the audio is used in conjunction with that (it works very well), while MT and Pimsleur are audio-only afaik.

• This reply was modified 11 years, 2 months ago by  嶋家 雷.