“Looks like I got myself lost again…” muttered Nanami.
She had no idea – where she was.
Absolutely no idea.
While little time had passed since she had finished off Kamakiri, she should have been home at the hut by now, but somehow, she was still stuck in the mountains. Somehow – despite having spent twenty years living on the island.
So easily disoriented.
One of her many weaknesses.
Born sickly, Nanami moved at an unusually slow pace that only spurred her tendency to lose her way. Playing off of Togame’s habit of comparing her own strength to that of shoji paper, we could say that Nanami, head of the Yasuri family, and once the strongest in Japan, was as slow as a snail.
No wonder Shichika never asked his sister to help with the chores.

Katanagatari Omnibus 2, Page 51