Osaka is 13 hours ahead of Miami

There is no standard 8-to-6 overlap. Someone joins early or late.

Osaka is 13 hours ahead of Miami, so their typical working days don't line up at all. Plan on one side joining outside normal hours. A recurring slot that trades off between early mornings and late evenings usually works best. Just remember Miami changes its clocks for daylight saving and Osaka doesn't, so confirm the overlap whenever the seasons turn.