Shibukawa(渋川市,Shibukawa-shi) is a city located in the center of landlocked Gunma Prefecture in the northern Kantō region of Japan. As of February 2015, the city had an estimated population of 208,705 and a population density of 1500 persons per km². Its total area was 139.44km². Shibukawa is the location of Ikaho Onsen, a popular hot spring resort.