The arquebus spread further east, reaching India by 1500, Southeast Asia by 1540, and China sometime between 1523 and 1548. They were introduced to Japan in 1543 by Portuguese traders who landed by accident on Tanegashima, an island south of Kyūshū in the region controlled by the Shimazu clan. By 1550, arquebuses known as "tanegashima", "teppō" or "hinawaju" were being produced in large numbers in Japan. The "tanegashima" seem to have utilized snap matchlocks based on firearms from Goa, India, which was captured by the Portuguese in 1510. Within ten years of its introduction upwards of three hundred thousand tanegashima were reported to have been manufactured. The tanegashima eventually became one of the most important weapons in Japan. Oda Nobunaga revolutionized musket tactics in Japan by splitting loaders and shooters and assigning three guns to a shooter at the Battle of Nagashino in 1575, during which volley fire may have been implemented. However, the volley fire technique of 1575 has been called into dispute in recent years by J. S. A. Elisonas and J. P. Lamers in their translation of "The Chronicle of Oda Nobunaga" by Ota Gyuichi. In Lamers' "Japonius" he says that "whether or not Nobunaga actually operated with three rotating ranks cannot be determined on the basis of reliable evidence." They claim that the version of events describing volley fire was written several years after the battle, and an earlier account says to the contrary that guns were fired en masse. Even so, both Korean and Chinese sources note that Japanese gunners were making use of volley fire during the Japanese invasions of Korea from 1592 to 1598. Tanegashima were widely used during Hideyoshi's unification of Japan and later the Japanese invasions of Korea in 1592.