It's possible, but you really wouldn't want to do it.

English teachers are basically considered losers in Japan. Those who try to make a career out of it completely bewilder the Japanese (and most other foreigners here).

Not because the teachers here are bad people, but because the job is so completely crappy.

If you really want to be in Japan, becoming a teacher (temporarily, with any luck) is a way to achieve that goal.

If you really want to be a teacher, being in Japan is not gonna help; staying and working in your home country is the only way to go.

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