Sub out Black Dragons in Zelot's post and you have the reason we're in Seto as well. Don't forget that the Hogosha and FA are deeply intertwined with Samura. Now Samura has holdings there, which means we are brought in for protection, black ops, etc.
The Black Dragons are supposed to be involved in intelligence gathering for the government as well. Therefore we are there, watching, learning, and interrupting trade whenever we can. Never forget that the Hogosha are not pirates. We do pirating when it's useful, but we are not like the most of the Bretonian pirates. We are not illegal in Kusari and we are not enemies of the state.
That means we work for the state when needed, wherever the state operates. In this moment that includes half of Leeds.
EDIT: I know this is the AFA feedback, but the Hogosha were mentioned so here I am. By Zelot's leave of course.. If you'd rather I didn't I'll stay out of here ;-).