I assume you mean teaching English in Japan. If so:
GaijinPot
Dave's ESL Cafe
JapanProbe classifieds
Teaching English in Japan, abridged: your basic options are eikaiwa, dispatch, or private/direct-hire. Eikaiwa (AEON, GEOS) will accept almost anybody and you have a decent chance of being placed in a urban/suburban area, but you are paid by the hour and mostly have no control over your schedule, which is usually set for weeknights (and possibly Saturdays) -- meaning very little socializing. Dispatch (JET, Interac) has standardized hours and a proper salary, but placement is random; most people end up in rural areas, and getting into a city for nightlife is costly. Private/direct-hire has the best placement and pay, but you have to deal with all problems on your own, and positions almost all require certification (including English teaching experience, usually at least 1 in Japan).
None of the options offer much job security (if clients are upset, they can get rid of you easily), all of them require high start-up costs (to the tune of ￥500,000 for the first two months), and there's no guarantee that you will enjoy your assignment any more than ESL positions in any other country. While most teachers enjoy their time in Japan, there is no shortage of those who have had terrible experiences.
In the mean time, I think this thread needs to be moved to the Japan Discussion subforum.
