Japanese shipwrecks on coast predate Columbus

The case of John Ottoson (ne Otokichi) in 1832 illustrates what can happen: Blown off to sea by a gale, he and his comrades rode the Kuroshio Current to Washington State — much to the astonishment of Dr. John McLoughlin. (Oregon Coast; 1830s) (For text and pictures, see https://offbeatoregon.com/1404d.japanese-junks-blown-across-to-oregon.html)