That is something we've discussed, yes. Hizamaru told me that he plans to ask Chuuya for a special sageo embued with magic, one he hopes will keep Higekiri from causing further damage for his sake. We don't know if it will work, but we've decided to explore every option we have.

And if that fails... [ there's a small smile. ] I'm sure Hizamaru will write to him, one final time, to ask for his brother's cooperation.

As for that... we don't know any more than you. There have been more than one demon in a week before, right? It can just as easily happen again.