is an onsen resort in Iwaki, Fukushima Prefecture in Japan. History Although known since the Nara period, the hot springs at Iwaki developed with borehole drilling in the Jōban Coal Fields in the Meiji period. To the west of the traditional onsen town is the Spa Resort Hawaiians. See also Three Ancient Springs External links Hot springs of Fukushima Prefecture Spa towns in Japan Tourist attractions in Fukushima Prefecture Iwaki, Fukushima