Tekka Zuka is a mound on which the authorities would conduct superstition-based trials to resolve boundary disputes; such trials included the Tekka Saiban (literally the 'red-hot iron trial,' which involved the concerned parties taking hold of a red-hot iron bar to enable a judgment to be made on the issue in question based on whether a burn appeared on their hands) and Higisho (a trial which involved the concerned parties taking hold of a piece of red-hot iron to enable the truth of the matter to be ascertained based upon whether they were able to continue holding the iron piece in their hands).
-鉄火塚とは地境の紛争の審理として、鉄火の裁判や火起請といわれる迷信のような判定が、「お上」によって行われた。