"In 1582 Alessandro Valignano, the Visitor to the Jesuit Mission in the East Indies, sent four Japanese ...to Europe. Until the arrival of this embassy (the Tenshō embassy) in Europe, the Euro-Japanese encounter had been almost exclusively one way: Europeans going to Japan. This book is an account of the travels of these Japanese pioneers, their long journeys out and back, and their 20 months in Europe being received by popes and kings."
Source: Book launch
Japanese Travellers in Sixteenth Century Europe:
A dialogue concerning the mission to the Roman Curia (1590)
Edited by Derek Massarella, Translated by J.F. Moran
Published by Ashgate for the Hakluyt Society http://www.dajf.org.uk/event/japanese-travellers-in-sixteenth-century-europe-a-