Original sentence: In the years before the 1592 Japanese invasion of Joseon, the main purpose of the tongsinsa visits to Japan was to make formal requests to the shogun to take control of waegu (J: wakō), or "Japanese pirates", which ravaged and plundered along Joseon’s coastline.The Joseon royal embassies to Tokugawa Japan were missions sent intermittently by Joseon Dynasty Korea to the Tokugawa Shogunate of Japan between the years 1607 and 1811.The first actual visit to Japan by Joseon envoys took place in 1429 (11th year of King Sejong's reign) when the delegation, led by Bak Seo-saeng (박서생, 朴瑞生), arrived in Kyoto
Edited sentence: In the years before the 1592 Japanese invasion of Joseon, the main purpose of the tongsinsa visits to Japan was to make formal requests to the shogun to take control of waegu (wakō), or "Japanese pirates", which ravaged and plundered along Joseon’s coastline.The Joseon royal embassies to Japan were missions sent intermittently by Joseon Dynasty Korea to the Tokugawa Shogunate of Japan between the years 1607 and 1811.The first actual visit to Japan by Joseon envoys took place in 1428 (11th year of King Sejong's reign) when the delegation, led by Bak Seo-saeng (박서생, 朴瑞生), arrived in Kyoto