>>2179673It's not necessary but it'll help a lot in teaching in non-adult schools. Over there the English classes are done in 100% English, don't speak any Japanese, so it's actually not necessary to know it at all to go there. But i think having good grammar and proper speaking skills will help me a lot if i was to live there. Plus it can't hurt to help my current problems. My grammar isn't amazing due to how i learnt it.
