The problem with Samura is troubling, and as much as we abstain from house politics, it is clear that Samura holds great power in Kusari. So, while it does not matter to us where the artifacts are delivered, the only solution I can see to this problem, is that you manage to not let them catch you, or simply not deliver the artifacts to Kusari. There are a myriad of other peoples that are eager to get their hands on these trinkets.
What Samura does in Kusari is up to them, however, we do not see how it would prevent business being done with both companies on our side. As neither business will be at a detriment to that of the other. However, this seems to be a problem within the House of Kusari, so the problem of shipping artifacts into Kusari is one that you must sort out with Samura. No matter the conclusion, it will not prevent you from doing business with us.