On the other hand, as the soldiers who guarded the garden inside kept night watch at a corridor, their station near Mikawamizu no ochiguchi, also called 'Takiguchi,' in the northeast of the eastern garden of the Seiryoden, these warriors who guarded the Seiryoden came to be called 'Takiguchi.'
一方、庭を警護する兵士は清涼殿東庭北東の「滝口」と呼ばれる御溝水（みかわみず）の落ち口近くにある渡り廊を詰め所にして宿直したことから、清涼殿警護の武者を「滝口」と呼ぶ様になる。