Hey,
Im in Hong Kong atm so I assume the Asian session is what you are referring to.
Indeed vol is lower across all pairs and I think it is more a matter of identifying which pair or pairs is more active on any given day than which pairs to pick and stick with from the start.
Now having said that, JPY crosses are always to be monitored, and so are aussie and kiwi especially on days of significant eco data release.
But the assumption of the thread is that you are looking at majors. Obviously if you want to find some decent vol during the Asian session, then Asian exotics will be good targets, i.e. SGD, THB, INR, IDR, and TWD particularly.
🙂