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.
Christopher dan Cosmas merupaka dua orang Jepang, yang hanya dikenal dengan nama Kristen mereka, yang tercatat telah mengarungi Pasifik dengan galiung Spanyol pada 1587, dan kemudian bergabung dengan navigator Inggris Thomas Cavendish ke Inggris, Brazil dan Atlantik Selatan, di mana mereka menghilang ketika kapal mereka tenggelam pada 1592.