Certificate of Eligibility inquiries

Hi, Good day! I’m from Philippines and our Marriage Certificate has a clerical error for my wife’s mother’s name. One incorrect letter to mother’s name.

This month, we are applying for a COE in Japan to later on apply for Family Stay Visa since my wife is in Japan.

I have questions regarding this application:

1. Does a clerical error on my wife’s mother’s name affect our application’s success rate? (note: correction is still on going and may take 6months to be effective)

2. Do we need to provide other documents that proves our identity aside from our Marriage Certificate? Documents such as Birth Certificate, Certificate of No Marriage, etc? I am worried that this might affect our application since my wife’s mother’s name is somehow different from what is in our Marriage Certificate.

Note: I searched for COE requirements and most of them submitted just the Marriage Certificate as a requirement on my end.

Thank you and I appreciate your answers!