Yeah, the IME is disabled in the client even though the options for some weird reason sometimes pop up for me, they're un-usable. :[

As far as I know, there is no way of enabling it without using prohibited ways, other than using a Japanese game (or just the viewer?) as stated here.
I don't remember if the account needs to be actually Japanese as well?

It is very annoying, and I am quite sure they could allow us to take advantage of it, but I'm also quite sure they just wont.
In all fairness, the Japanese should not be allowed to write in 'our letters' since we're not allowed 'theirs'.


/grin