in resupplying troops on land, was one of the major reasons for the invasion's ultimate failure. After the death of Toyotomi Hideyoshi, the main proponent of the invasion, the Japanese ceased attacks on Korea. Invasion of the Ryūkyūs In 1609, Shimazu Tadatsune, Lord of Satsuma, invaded the southern islands of Ryūkyū (modern Okinawa) with a fleet of 13 junks and 2,500 samurai, thereby establishing suzerainty over the islands. They faced little opposition from the Ryukyuans, who lacked any significant military capabilities, and who were ordered by King Shō Nei to surrender peacefully rather than suffer the loss of precious lives. Oceanic trade (16th–17th century) Japan built her first large ocean-going warships at the beginning of the 17th century, following contacts with the Western nations during the Nanban trade period. William Adams In 1604, Shōgun Tokugawa Ieyasu ordered William Adams and his companions to build Japan's first Western-style sailing ship at Itō, on the east coast of the Izu Peninsula. An 80-ton vessel was completed and the shōgun ordered a larger ship, 120 tons, to be built the following year (both were slightly smaller than the Liefde, the ship in which William Adams came to Japan, which was 150 tons). According to Adams, Ieyasu "came aboard to see it, and the sight whereof gave him great content". The ship, named San Buena Ventura, was lent to shipwrecked Spanish sailors for their return to Mexico in 1610. Hasekura Tsunenaga In 1613, the daimyō of Sendai, in agreement with the Tokugawa shogunate, built Date Maru, a 500-ton galleon-type ship that transported a Japanese embassy to the Americas, and then continued to Europe. Red Seal ships From 1604, about 350 Red seal ships, usually armed and incorporating some Western technologies, were authorized by the shogunate, mainly for Southeast Asian trade. Japanese ships and samurai helped in the defense of Malacca on the side of the Portuguese against the Dutch Admiral Cornelis Matelief in 1606. Several armed ships of the Japanese adventurer Yamada Nagamasa would play a military role in the wars and court politics of Siam. William Adams, who participated in the Red Seal ship trade, would comment that "the people of this land (Japan) are very stout seamen". Planned invasion of the Philippines The Tokugawa shogunate had, for some time, planned to invade the Philippines in order to eradicate Spanish expansionism in Asia, and its support of Christians within Japan. In November 1637