I'm playing in a Jade Regent campaign, and I have a suit of Tatami-Do. I'm not sure exactly how long it would take to equip it.
The donning table for the western armor is very specific to each set, but there's not one at all for the eastern stuff.
At a quick guess, find whichever suit of armour grants the same AC bonus and use that don time.
The table actually is nicely divided into "less than or equal to +4", "+5 to +7" and "+8 or higher", so go with that.