However, according to an old document named "Tokuyama Gokanpu Ikken" of the Tokuyama clan, the place in question was located in less than 18 meters inside or outside the boundary.
しかしながら、徳山藩の旧記『徳山御還附一件』によると問題の場所はわずか10間足らずの出入りに過ぎなかったようである。