Abstract
In 1582–83, Alessandro Valignano, S.J., Visitor of the Jesuit missions in Japan, authored the Advertimentos e avisos, a behavioral manual instructing missionaries on adopting Japanese customs to gain credibility and facilitate conversions. His approach, emphasizing etiquette, hygiene, and social rank, clashed with Father General Claudio Acquaviva’s concerns about cultural accommodation. This study examines Advertimentos as both a practical guide and an educational text, drawing from European humanist traditions and Jesuit training manuals. It highlights Valignano’s strategic use of adaptation in missionary education and explores how his pedagogical model influenced Jesuit engagement in Japan and broader global missions.