Well, let's see. Japan's early start on exploration is reaping dividends, even if they didn't get all the salvage. Having a hidden new Earth is an awesome find, and I wonder if they'll pull an Eridani and migrate entirely
. On the other hand, as they've noted their fleet is uniquely unsuited for jump point interdiction, so if any power really wants to they could probably scout Epsilon Indi and find the jump point. I wonder if they'll start getting suspicious of the amount of cargo ships heading into the system.
The wild card is the aliens in Lacaille. The Japanese can't tell the world about them, because if they did there's no way their claim on Epislon Indi wouldn't be challenged. On the other hand, if the aliens come through the wormhole then the Fomalhaut colony could be cut off.