Nagano is perhaps Kusari territory (as well as Rishiri in that matter), but it is still Tau Border Worlds system in the info card. Either both mark Nagano and Rishiri as Kusari or Tau Borderworlds, because this is where problem lies.
I think the problem is that we have two different divisions of the Sirius:
- Political/roleplay map of the Sirius, where e.g. Nagano [and gactually Rishiri] are Kusari territory.
- Astronomical map of the Sirius, where Nagano, Oita and Rishiri are Tau Border Worlds.
So the issue here is: what we count in ZOI: astronomical (infocard) or political (roleplay/forum) division? If we count the second one, my ZOI is extended onto Coronado, because Inverness is a Bretonian territory, as charted on their maps. If we count the first one, I have full access to Nagano and Rishiro, as they are Tau Border Worlds.
As a sidenote, I think Nagano with Planet Tomioka is like Sigma-19 with Planet Kurile, while not being officially controlled by Kusari, it is controlled by Samura.