Japanese Manual
Thanks to the work of Takaaki Kato there now is a Japanese TextMate manual.
A few things still need to be translated (there is an issue tracker) but it should already be very useful for people who prefer reading Japanese over English.
And no, this does not mean that a new CJK-compliant TextMate has been released. The best approach for using CJK with TextMate is still via the plug-in.