Minna-scan is on the look for proofers, preferable with some knowledge in Japanese, but not a requirement.
Either have past works in HQ groups (although LQ groups don't use PRs, but in case they do...) or need to pass a test from us.
We are looking for one espacially for Worst and Crows and maybe another one for the many other projects M-s have (which you can see on Minna-scan's page on MU)
