Chigikawa is the third province of the Modern Era, one of two Modern Era provinces (the other being Kyushima) unlocked after taking control of Natsuishu to the northwest. Taking over Chigikawa unlocks Igujima to the south.
If previous sectors acquired by negotiation:
I am bound by duty, and my life belongs to Hisao Hito. Still, I am worried about the fate of this empire and wonder if he steers the right course.
If at least one sector taken by force:
I am bound by duty, and my life belongs to the empire of Hisao Hito. I will happily die for it.
I will do what is required of me.