I am having a lot of trouble with this match-up. Just finished playing a few games with a Hazama and I just could not find a way to win. Any zoning stein will easily get punished by chains, especially if they are air steins. The neutral stein won't be of much use without 236D, though. If Hazama moves around the tracking on the laser freaks out and it won't be shot anywhere near Hazama. 214D to stop chains does not work because it has such a long startup. Mu will just get countered out of it by a chain, and if Hazama countered late enough the steins will all disappear with no explosion (stupid feature).
The only times I could get ahead where when I oki'd and rushed that shit down. If Hazama gets out Mu has a very difficult time of getting back in unless she has steins which are hard to get in neutral. Mu's air to ground game is pretty terrible, and that is the only way she can get in without steins.
6C is pretty much useless in this match-up. The start-up will get chained every time unless you do something weird like 6C for oki. Even if it doesn't get countered by a chain during start-up if the head of the chain is anywhere in the hitbox the two will clash.
Not actually specific to Hazama, but has anyone else realized how useless Omohikane is has a reversal super? I have had some pretty bad clashes with it, but Hazama's 5A clashing with it definitely takes the cake. Better to just DP in every situation.