Ningen, which translates to "human" in Japanese, refers to the species Homo sapiens. Humans are characterized by their ability to think, reason, and communicate through complex languages. They possess advanced cognitive skills, allowing for problem-solving, creativity, and social interaction. Humans are bipedal primates with a unique physical structure, including an upright posture and highly developed hands. They are social beings, often living in communities and forming intricate relationships. The study of humans encompasses various fields, including anthropology, psychology, and sociology, which explore their behavior, culture, and evolution.