Almuni can request the following certificates online. 
Move on to the application webpage from here.

 – Certificate of Gratuation
 – Transcript of Academic Record
 – Certificate of Enrollment

Inquiry:

Faculty of Liberal Arts:  kyouyou[at]gr.saitama-u.ac.jp, 048-858-3044
Faculty of Economics: keizaigakumu[at]gr.saitama-u.ac.jp, 048-858-3287
Faculty of Education, Graduate School of Education: ikugakumu[at]gr.saitama-u.ac.jp, 048-858-3144
Faculty of Science: rigaku_gakumu[at]gr.saitama-u.ac.jp, 048-858-3345
Faculty of Engineering: eng-aa[at]gr.saitama-u.ac.jp, 048-858-3429
Graduate School of Humanities and Social Sciences: jinsha[at]gr.saitama-u.ac.jp, 048-858-3320
Graduate School of Science and Engineering: rikou[at]gr.saitama-u.ac.jp, 048-858-3430
Office of International Affairs (exchange students): ryugaku[at]gr.saitama-u.ac.jp, 048-858-3967