Oyama Shrine used to be called Utatsu Hachiman Shrine. Maeda Toshinaga established it in 1599 to honor Maeda Toshiie, the former clan lord of Kaga. Later in 1873, it was moved to the present place from Mt Utatsu.

A Dutch designer, Holtman, designed the entrance gate to Oyama Shrine. The gate blends three architectural styles: Western, Chinese and Japanese. The stone arch in the first section has a structure of wood and seems to be something akin to Ryūgū-jō. The Dutch five-colored stained-glass windows on the top floor are beautiful.

At one time, the gateway was used as a lighthouse for Kaneishi port. It has a height of 25m, including the lightning conductor. In 1950, it was designated as an important cultural asset.