There are Business jobs for Foreigners in Japan so I would likely say so. Iv come across a good few business jobs anyway, nothing particularly in Administration but I would imagine there will be jobs available for it. Although I can't point you further to anywhere to look for jobs (don't really know anywhere myself), I just usually did alot of google searching jor jobs and then eventually got results.

Did your course include the Japanese classes? Did they teach you 'Business' Japanese Language? Some of the jobs advertised having 'Business' level Japanese so just wanted to let you know