Taiwan isn't a country and yeah as others it was DPP playing politics behind that move.I read the other day that Taiwan is the only country in Asia to allow gay marriage.
Japan is a very modern society, Philipines highly christianised , Vietnam and many others are highly secularised. Yet all recognise that it is an alien concept to Asia.
Asia by and large is still conservative especially the older generation , most tolerate LBGT but Iegalizing and normalizing is another step too far I suspect.