In actuality, Kamakiri Maniwa had no change to offer up his name before Nanami took him down; and subsequently, during torture time, the atmosphere was not exactly conducive to self-introductions – meanwhile, Nanami totally forgot to ask him who he was – although Chocho could hardly be expected to deduce as much.
He was as yet unaware.
Of the power of the woman before him.
But what could he have done – Nanami Yasuri possessed a strength that was not to be kenned at first sight. It was nonpareil, belonging to a whole other dimension from the showy kind of strength –

Katanagatari Omnibus 2, Page 52