Sakamoto San is a supporting character in the anime and manga series 'Nichijou' (My Ordinary Life). He is a black cat who gains the ability to speak thanks to a red scarf created by Hakase. Sakamoto acts as the mature, sarcastic figure among the trio of Hakase and Nano, often providing witty commentary and trying to maintain order in the house. Despite his best efforts to appear dignified, his cat-like instincts frequently get the better of him, leading to humorous situations.