The ambassadors arrived back in Japan on July 21, 1590. On their eight-year-long voyage they had been instructed to take notes. These notes provided the basis for the De Missione Legatorum Iaponensium ad Romanam Curiam ("The Mission of the Japanese Legates to the Roman Curia"), a Macau-based writing by Jesuit Duarte de Sande published in 1590.
According to Derek Massarella, "Valignano conceived the idea of a book based on the boys’ travels, one that could also be used for teaching purposes in Jesuit colleges in Japan," but "despite its authors’ intentions," De Missione "made no lasting impact on Japanese perceptions of Europe.
The four were subsequently ordained as the first Japanese Jesuit fathers by Alessandro Valignano.
Mancio Itō died in Nagasaki on November 13, 1612. Martinho Hara was banished from Japan by the Tokugawa shogunate in 1614, and acted in Macau. He died in Macau on October 23, 1629. Miguel Chijiwa left the Society of Jesus before 1601, and died in Nagasaki on January 23, 1633. Although he is generally believed to have abandoned Christianity, the discovery of what appear to be rosary beads in his grave in 2017 place this in some doubt. Julião Nakaura was caught by the Tokugawa shogunate, and died a martyr by torture in Nagasaki on November 21, 1633. He was beatified on November 24, 2008.
