The Satsuma is a member of the orange family and was brought to Japan from China in the mid-16th century. Known for its thin, easy-to-peel skin, it grows well in the cold citrus areas of Japan. The rind contains numerous oil glands, which is a source of essential oils used for perfumes and body products. The essential oil is cold-pressed from the peel of the fruit and is typically a yellow or orange color. The oil, which has a sweet, tangy scent much like the fruit itself, moisturizes and nourishes the skin.