Sakamoto (阪本) is a male black cat from the Nichijou franchise. He wears a red scarf created by the Professor, which allows him to talk to humans. He is aged 20 in cat years — older than both Nano and the Professor — and speaks in a condescending tone towards them and tries to act like the adult of the house, though to his shame he occasionally succumbs to his cat-like habits.
His original name was Taisho (Boss) and was once Ms. Nakamura's pet cat.
The artist kazenokaze uses this cat often in his works.