Since the following large remains of the Yayoi period were found in the area facing Japan Sea, the area is considered to have been a cultural center on the Japan Sea side: Ogitani Remains and Tochugaoka Remains in Mineyama-cho, and Nagu Remains of Yasaka-cho.
日本海に面する市域一帯には、峰山町に扇谷遺跡、途中ケ岡遺跡、弥栄町に奈具遺跡など弥生時代の大遺跡があり、日本海側における文化の一大中心地であったと見られる。