However, there were anti-merge sentiments due to the different background of people from both areas; Higashi-Maizuru had rapidly developed as a navy and army port in and after the Meiji period, but Nishi-Maizuru had developed as a castle town since the Sengoku period (period of Warring States).
しかし、東舞鶴は明治時代からの軍港から急速に発展した都市にあるのに対して、西舞鶴は戦国時代からの城下町から発展した都市であったため、住民感情に大きな相違があった。