Frederick Coyett, born in Stockholm or Moscow c. 1615, buried in Amsterdam, October 17, 1687, was a Swedish nobleman and the last colonial governor for the Dutch colony of Formosa. He was the first Swede to travel to Japan and China and became the last governor of Dutch-occupied Taiwan (1656–1662).
Frederick Coyett was the brother-in-law of François Caron, both involved in releasing ten Dutch prisoners. Their discussion centered on the Nambu affair of 1643, when the skipper Hendrick Cornelisz Schaep and nine members of the crew of the Breskens were captured in Yamada in Iwate Prefecture.
“The Breskens and her sister ship the Castricum (under Maarten Gerritsz Vries) had been sent by order of the Governor General in the Dutch East Indies, Anthonio van Diemen, to search for the Gold and Silver Islands that were said to lie somewhere northeast off the coast of Japan. They were also to investigate a route to northern Asia. In June 1643 the Breskens, which had been separated from the Castricum in a storm, entered the bay of Yamada in Nanbu domain in the northeast of Honshu. While searching for fresh water and food, ten crewmembers under Captain Schaep were apprehended and brought to the domain capital of Morioka. They were later sent to Edo.
Unhappily for the Breskens’ crew, a group of four Jesuits intent on infiltrating into Japan had been caught at around the same time in a different part of Japan. As a result, bakufu officials were extremely anxious about the problem of coastal defenses. However after it was understood that the crew were Dutch and not Catholics, bakufu fears were calmed and the problem to be solved became one of deciding by which procedure the Dutch should be released.”