Using body bag in Japan frowned upon for office work?

Hey guys, quick question.

I’ve noticed that in Japan most people going to the office carry either a backpack or a suitcase/briefcase. Would it be frowned upon if I used a body bag (sling/crossbody bag) instead for office work? Or is it considered too casual/unprofessional?

Just wondering if companies expect you to stick to backpacks/suitcases only.

Thanks!

EDIT: Haha Laughed so hard at my own post. Sorry, I usually refer to it as my body bag because… well, I got used to calling it as such.

But yeah, you all get my point! 🤣🤣

Thank you guys!