 He obtained a red-seal license ("shuinjō") from Hideyoshi, permitting him to trade in the ports of southern Vietnam, where he obtained silks and other goods.Chaya was supposedly the one who informed Ieyasu of Oda Nobunaga's death in 1582, and thus allowed him to escape the forces of Akechi Mitsuhide and Hideyoshi, who seized power in the aftermath.He is said to have helped design the layout of the city of Edo, and for his last year or so of life, did not leave Ieyasu's side.