The detailed anatomical investigation of the resin canal in the Rhus plants found in Japan is almost limited to Rhus vernicifera at present, therefore I will now describe my investigation on the distribution and construction of the resin canal of the six species of the Rhus plants in Japan (R. succedanea, R. sylvestris, R. vernicifera, R. trichocarpa, R. Toxicodendron var. vulgaris and R. semialata var. Osbeckii).