According to Traditional Chinese Medicine, which organ controls certain emotions and stores urine?

In Traditional Chinese Medicine (TCM), the kidney is considered a crucial organ that plays a significant role in various physiological and emotional functions. The kidneys are associated with storing essence (Jing), which is vital for growth, development, and reproductive health.

The kidneys are also believed to house the "will" and are closely linked to emotions such as fear and anxiety. This connection highlights their role in emotional regulation.

Moreover, from a functional perspective, the kidneys are directly responsible for controlling water metabolism and the production of urine. This encompasses the acting influence on the urinary bladder, which is responsible for the storage and expulsion of urine but relies on the kidney's function to manage fluid balance in the body.

Therefore, the kidney's dual role in both emotional regulation and urinary control makes it the organ that embodies the features described in the question.