This is fucking dumb to be honest. Just cast whoever can play that character well. Lewis Tan is not Japanese but he'd be great for Zoro.
To me Zoro is the Japanese/asian equivalent of Thor so I am excited to see new faces ( seeing the same face for every role can take me out of a film)
The guy on my avatar who is Japanese got the ladies thirsty as eff with 10k likes when the original tweet was there but you can still see the comments.
He needs to buff up more, and take some advance English course he is ready to go.
There is this cosplayer from Thailand
Reddit comment " More like Beast mode He captures Zoro's attitude well. His shoulders and face look relaxed, yet you can see his hand clutching his swords tightly, the other barely raised, his weight leaning slightly forward, ready to strike!"