Applying to Waseda SILS

Hello!

Sorry for the repetitive question, but I want to make sure that I've understood this properly so I don't screw up on my actual application.

I know that "Document to Prove Your Applicant Qualification (Certificate of graduation or Certificate of expected graduation of the senior high school etc.)" means that they're asking for proof that I have a high school diploma.

Is it okay if I literally just make a color photocopy of diploma, take it to my school's registrar, and have them stamp or sign it? Or should I play it safe and use the "TEMPLATE: Certificate of
Graduation/Expected Graduation" document they've posted up on their admissions page?

Thank you in advance!

it is better to ask Waseda directly.

"just make a color photocopy of diploma"
this means you already graduated the high school ?
you already have the certificate issued by the school.
then, I have a question. if you unfortunately lose that document accidentally, what can you do next ?
does your graduation become invalid ?, because you lost the document. I don't think so. I believe that the school will issue a certain document which proves your graduation. Waseda request that document.

in Japanese, it is called as 卒業証明書 or 卒業見込証明書.