Once Masamune obtained an approval of Ieyasu, he appointed Luis Sotelo as the ambassador of the delegation, and dispatched over 180 people including his retainer Tsunenaga HASEKURA to Viceroyalty of New Spain (Mexico), Spain and Rome (Keicho era mission to Europe).
政宗は家康の承認を得ると、ルイス・ソテロを外交使節に任命し、家臣・支倉常長ら一行180余人をヌエバ・エスパーニャ（メキシコ）、エスパーニャ、およびローマへ派遣した（慶長遣欧使節）。