The East Asian War and trade between Kyushu and Southeast Asia in the late sixteenth century: Centered on Katō Kiyomasa's trade with Luzon

Abstract

This article uses Japanese, Chinese, and Western European sources to discuss the plan of the main Japanese general Katō Kiyomasa 加藤清正 to trade with Luzon in the course of the war to invade Korea in the 1590s. In December 1593, Katō Kiyomasa sent a letter from Korea to his territory of Higo directing them to send one of his “Tang boats” to import large quantities of goods such as wheat and silver. At the time, Tang boats were generally used for long-distance routes, and wheat was one of the main goods imported from Japan to Luzon, so this Tang boat may have been sent to Luzon 呂宋. As the East Asian War dragged on, Katō Kiyomasa was very worried about lacking munitions (particularly gunpowder), so he planned on using profits from the Luzon trade to supplement the ever-growing military expenses.

In late-sixteenth-century East Asia, military consumables such as lead and saltpeter were mainly imported through three routes to Japan: the Portuguese Macau–Nagasaki trade, the Chinese smuggler Fujian–Kyushu trade, and the relay trade from China or Southeast Asia through Luzon to Kyushu. However, around 1593, due to the impact of the East Asian War, munitions imported from China to Luzon fell sharply, and the Spanish were also faced with a lack of munitions. On the other hand, while Japan's gold demand as a means of making military expenditures was surging, Katō Kiyomasa certainly planned on importing gold from Luzon and using this to gather munitions like lead and saltpeter in the Japanese domestic market. In addition, starting in the 1590s, apart from Luzon, Japanese merchant ships also started visiting mainland parts of Southeast Asia and trading with them, showing that the red-seal ship trade of the early seventeenth century had origins in the late sixteenth century.