"On the fields of war and sites of vicious massacres, where the blood of thousands of warriors has saturated the soil, a strange kind of tree can be found. From afar, jubokko appear to be ordinary trees, indistinguishable from the various species that dot the landscape. It takes an observant eye to notice the slightly more fearsome features of its branches, or the piles of human bones buried in the undergrowth beneath the tree. In fact, they were once normal trees; but the vast amounts of human blood absorbed through their roots transformed them into yōkai. Thereafter, the trees thirst only for human blood."