"Site of Kosuge ship repair dock". Kyuyama. Retrieved 17 February 2012. "小菅修船場跡". Agency for Cultural Affairs. Archived from the original on 10 December 2019
Historic Site designation. One is the ruins of the Terayama Charcoal Kiln (寺山炭窯跡, Terayama sumigama ato), which supplied charcoal to Shuseikan reverberatory