Dear Mam, hope you are doing well.

As far as it is known to me, you can earn heavily if one is well versed with N1. You can get job offers even if you are N3 in the range of 4L onwards. If one is a IT professional & is aware of the language till N3 level, he/she can surely earn upwards of 4-5L. I will suggest you to get in touch with Japanese teaching institutes in India & around your area to get an estimate of the earning capacity available in Japan if one learns the language completely.

Thanks.

4-5L