Santiago is 12 hours behind Osaka

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

Osaka and Santiago live on different parts of the day. With 12 hours between them, standard working hours simply don't meet. Make the most of handoffs — end-of-day in one city becomes start-of-day in the other, so pass work along rather than meeting live. For part of the year the maths changes: Santiago observes daylight saving, Osaka does not, shifting the overlap by an hour.