How would I report a Graduate Diploma on the visa renewal form?

I need to report my highest level of education. It’s from an Australian university. It’s above a Bachelor’s but beneath a Master’s.

When I put “Graduate Diploma” into DeepL, it spat out 大学院（修士）but that feels off. Google confused the term with the physical piece of paper.

Should I just choose 大学?

Or should I choose その他 then write something like 大学院（ディプロマ）

Cheers

by Eptalin