
Ōyumi was a giant type of crossbow that is mainly a mystery. It was first introduced in 618AD by the Korean kingdom of Koguryo with two Chinese prisoners of war to man it. By 675AD they were used in large scale warfare. When the Korean kingdom Scila and Tang China invaded another Korean kingdom in 894, Japan sent ships in the sea battle against the Chinese. They used crossbows, but it isn’t clear if they were ōyumi or handheld bows. Throughout the 900s, daimyos complained that the ōyumi they had were going to waste because no-one knew how to use them. During the Nine-Year War [1053-1062] the Japanese called ōyumi “ishyumi” [stone bows] because they used them to fling rocks. The last mentioning of a ōyumi was when Fujiwara no Yasuhira’stroops made a wall to stop the Samurai leader Minamoto Yoritomo (who became the first shogun) from advancing north in 1189. No ōyumi survived so we don’t know what they looked like. What do you think?