Christopher and Cosmas were two Japanese men, only known by their Christian names, who are recorded to have travelled across the Pacific on a Spanish galleon in 1587, and were later forced to accompany the English navigator Thomas Cavendish to England, Brazil and the Southern Atlantic, where they disappeared with the sinking of his ship in 1592.

Otokichi , also known as Yamamoto Otokichi and later known as John Matthew Ottoson, was a Japanese castaway originally from the area of Onoura near modern-day Mihama, on the west coast of the Chita Peninsula in Aichi Prefecture.