Hmm, I suddenly have the urge to quote
Shakespeare...
Depends on your priorities. Are they:
1) To fulfill your teenage life long dream (described in full detail here) of "living in Japan" by riding the demand that ignores the result and damns the rest?
- Sure, c'mon in!
2) To actually teach somebody English in a way that in the end, that person can actually converse in English?
- well, have you yourself learned a foreign language? If not, what insights can you give to a person whose starting efforts exceed your end results? How are your pedagogic studies going?
Better to follow somebody's example than simply walk alone to a direction he's vaguely pointing to.