[x]Request to be sent to the Hidden Village as per Silver Crane's proposal, to learn more about them.
Open negotiation would create problems as the cultural environment would give them more legitimacy than we would like. At the moment at least.
War strikes me as a fairly vainglorious strategy, quite likely to bog Summer down if it doesn't simply work outright. There's a lot of face to lose there, and a lot of resource to lose there. It's not an option to rely on. (In essence, I see it as the equivalent of charging into Afghanistan. You might win quickly, but all things considered it's also a pretty good place to take your empire if you want to lose it, especially if the people there have become attached enough to their new ideas that they decide not to simply roll over and capitulate when we defeat their leaders.)
Visiting the village in person however, while it might be taken as self serving, isn't a major threat to Summer, just to us personally. Our lord risks losing a simple servant, barely more than a ronin, for a chance to survey the situation and accrue a variety of options, both diplomatic and military alike.
