The "shōgun" had a new galleon built in Japan to bring Vizcaíno back to New Spain, together with a Japanese embassy accompanied by Luis Sotelo. The galleon, named "Date Maru" by the Japanese and later "San Juan Bautista" by the Spanish, took 45 days to build, with the participation of technical experts from the Bakufu (the Minister of the Navy Mukai Shōgen, an acquaintance of William Adams with whom he built several ships, dispatched his chief carpenter), 800 shipwrights, 700 smiths, and 3,000 carpenters. The "daimyō" of Sendai, Date Masamune, was put in charge of the project. He named Hasekura to lead the mission: