You probably need culturally and ethnically much more homogenous Asia that this could work. Europeans nations are more similar than Asian nations.
Even then, it's practically impossible for a group of people in Vietnam to stick to the same culture as a group of people in Syria. Pan-Asianism is impossible, as all Asians can't realistically share similar enough traits in culture and language for there to be a Pan-Asianism movement because Asia is too freaking big.