「お湯」(oyu) is the Japanese word for hot water. It is commonly used in daily life for various purposes, such as cooking, bathing, and making tea. In Japan, hot water is often enjoyed in traditional tea ceremonies, where it is used to prepare matcha, a powdered green tea. In addition to its culinary uses, お湯 is essential for relaxation and hygiene. Many Japanese homes have a bath called お風呂 (ofuro), where people soak in hot water to unwind. Public baths, known as 温泉 (onsen), are also popular for their therapeutic benefits and social atmosphere.