This is located at the 33rd milestone from Nihonbashi. The root of the cedar tree has rotted, creating a hollow space large enough to accommodate four adults, earning it the nickname "Namiki Hotel". The charred inside the hollow is believed to be caused by lightning strikes or campfires, and it is said that travelers passing through here in the past used it as shelter from rain. In 2022, a TV drama was filmed here, which gained it more popularity.