870s in Japan

was a after ''Ten'an and before Gangyō.'' This period spanned the years from April 859 through April 878. The two reigning emperors were and .

thumb | right | alt=The image shows a portrait of the Emperor Seiwa sitting cross-legged on a beige-coloured mat with blue and orange flowers. The mat is placed on a large bottle-green rug with white criss-cross edges. He is bald, and is wearing a full-sleeve, milky-white kimono-ish robe that drapes right down to his feet. His hands, not visible, are assumed to be in prayer pose under the robe holding a visible red-gold rosary with green tassels. | Portrait of the Emperor Seiwa , also known as Genkei, was a after Jōgan and before Ninna. This period spanned the years from April 877 through Febr