Nanban trade
Japan built her first large ocean-going warships in the beginning of the 17th century, following contact with European countries during the Nanban trade period. In 1613, the "daimyō" of Sendai, in agreement with the Tokugawa shogunate, built "Date Maru". This 500 ton galleon-type ship transported the Japanese embassy of Hasekura Tsunenaga to the Americas and Europe. From 1604 onwards, about 350 Red seal ships, usually armed and incorporating European technology, were also commissioned by the shogunate, mainly for Southeast Asian trade.