Sebastián Vizcaíno
"San Juan Bautista" is reported to have required 45 days' work, with the participation of technical experts from the Bakufu, 800 shipwrights, 700 smiths, and 3000 carpenters. Two Spanish men are also reported to have participated to the endeavour: the friar Luis Sotelo, and the Spanish captain Sebastián Vizcaíno.