Mugi-cha, also known as barley tea, is a common and refreshing drink in Tokyo. It is made by steeping roasted barley grains in hot water. Mugi-cha has a mild and nutty flavor, with a slightly bitter aftertaste. It is often served cold and is a popular choice for hydration during the summer months. Mugi-cha can be found in many convenience stores, supermarkets, and restaurants in Tokyo.