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. In addition to merchants, warriors and Spanish sailors, the Spanish Franciscan monk Luis Sotelo, who spoke fluent Japanese, also embarked. The legation wanted to obtain permission fro...