They (Ieyasu and his son, Hidetada) thought that Masamune dispatched an ambassador (Tsunenaga HASEKURA) to join hands with the King of Spain and Christian Authority, as a preparation for a revolt against Tenka."
彼ら（家康・秀忠父子）は政宗がテンカに対して謀反を起こすため、スペイン国王およびキリシタンと手を結ぶ目的で大使（支倉常長）を派遣したと考えた」