 On 1 March 1947 the city of Kobe expanded due to the merger of the town of Arima and nine other villages from the districts of Muko, Arima and Akashi.Of these, Arima town and the villages Yamada in Muko and Arino in Arima District became a part of Hyogo ward.On 1 July 1951 the villages of Hata, Dōjō and Ōzō that were located in Arima District merged into Kobe and Hyogo ward.