So you have two options here: number one is try to have a two blocks space when you fire hado, if he ducks on reaction, you can poke him with jab/low short. If he hits you with the follow up after ducking it means your spacing is not right. Number two is the follow up of ducking is negative 5 at least. So if you block it, you’ll have to revelsar ex tatsu and punish him and the whole situation will be reserved!! Hope it helps