旅: tabi. This category is the spatial twin of the temporal category, "impermanence." A central truth about renku (and about the universe) is that nothing lasts; all things fade away in time. When one travels, one experiences a spatial sort of impermanence. The poet-priests of Old Japan understood how important and how evocative of spiritual insight travel can be. This is not travel to experience the familiar (like some American tourists who eat at American fast food restaurants and stay at American-style hotels wherever they find themselves in the world). This is travel to experience strangeness: not just the strangeness of unfamiliar surroundings but also, within those surroundings, the strangeness of one's self.