There are apps/sites you can do language exchange with. I think hellotalk is the current trend. I have not used it but that should help you find someone to exchange with in Japan.
There may be Japanese locally as well. University students, interns at companies, maybe a Japan America society branch near you can introduce you to some. Interns and people here on 1-3 year rotations is down due to covid at the moment but often they are looking for people to hang with. You can learn Japanese that way. Anyway just some ideas albeit dependent on where you live.