The Japanese noun 'ネズミ (ねずみ)' refers to small rodents, specifically mice or rats. It is commonly used to describe these animals in everyday conversation. The word can refer to both wild and domesticated rodents, and it is often used in contexts involving pests, pets, or biology. For example: There is a mouse in the kitchen「台所にネズミがいる」(だいどころにねずみがいる). The rat ran away quickly「ネズミは速く逃げた」(ねずみははやくにげた). Note that while 'ネズミ' can refer to both mice and rats, the distinction between the two is often made clear through context or additional descriptors.