Un samouraï au Vatican

Why do 600 inhabitants of the small southern Spanish town of Coria del Río bear the surname "Japón"? It is the legacy of an unusual expedition that took place 400 years ago: In October 1613, the samurai Hasekura Tsunenaga boarded the galleon "San Juan Bautista" on behalf of the ruler Date Masamune in Sendai, Japan.