Type-30 bayonet (銃剣 juken or tanken) adopted in 1897 and used by Japanese forces until 1945 with the Model 38, 44 and 99 Arisaka rifles. Length (total): 18.5" (51cm); weight: 1lb 1oz (480g). Factory stamps: Matsushita Metals (松下金属) Kokura (小倉) Supervision. Photo: © Rory Marron Collection. tanken