Well, I've been known to fly in some supplies to the Dragons and GC on a few occasions. Their higher-ups are a bit suss of me, being not only a gaijin but a Bretonian on top of that, although they always appreciate the goods and services I provide.
However the risks associated with flying in Kusari mean I don't go there without a good reason.
Individuals within the Junkers banner might have reasons to go into Kusari, but the faction as a whole probably has more important things to do; like securing a bigger slice of the Liberty black market.
We have a Salvager; but what strictly Hogosha big stuff is there? I can count Hogosha encounters on one hand; the only one of them in a big ship was in a Corsair gunboat; the rest in an assortment of Kusari civilian gear.