Is a VISA required to work at NOVA?

I've been accepted for an interview at NOVA in Tokyo, and have also applied for one in Osaka due to it apparently being a bit cheaper to live in. I noticed when scrolling through other similar jobs they all require a degree, but NOVA doesn't? Has anyone been hired without a Degree? From my understanding it's for the VISA.

For reference, I've seen mixed (more-so on the poor-side) of reviews about NOVA, but I am just intending to use them as a stepping stone as I'm more qualified in IT and Engineering. However, whilst still learning Japanese I'm happy to do teaching, whether it be with a better NOVA equivalent once I get over there, or an ALT Job.