I don't really need help with correcting the grammar or anything; that's my job entirely. Knowledge of Japanese would be very helpful though, yes.
The only real problems I'm facing right now are some stiff and vague translations that can't really be 'proofread' since they're not understandable to begin with.
On those lines, I have to either
1. Make up my own lines that fit in the context(This is where your English needing to be decent is a requirement) or
2. Get a better translation of the text from someone who can understand Japanese.
If you think you can do at least one of the two points noted above, you can help me out.
I might be able to help with the making up lines that would fit in context. I'm a native English speaker, and I've been told I'm really good with writing, at least as long as I care enough about what I'm writing, so if you think I could be of some use, please let me know, as I have nothing going on except for on the 29th of this month through the 4th of July.