I am offering proof reading service to those who are still learning Japanese and need someone’s help. I’ve done this kind of thing for couple of years to my friends from abroad. Material can be anything what you wrote, from a letter to your Japanese friends to an essay assignment. I am honored to help you!
I’ve helped my friends in college, and they somehow got impressed with my work. That memory encouraged to offer more sophisticated service.
If the material contains too many technical terms (e.g., paper for organic chemistry), I would not be able to help you with it, since I’d like to provide the best service.