It is said that he understood the meaning of the articles presented by the Society of Jesus such as a world globe, a clock and maps (In those days Japanese did not know that this world was a round object and nobody could understand the explanation about the world being a globe at the time it was presented, but Nobunaga said that 'It makes sense' and understood it).
イエズス会の献上した地球儀・時計・地図などをよく理解したといわれる（当時はこの世界が丸い物体であることを知る日本人はおらず、地球儀献上の際も家臣の誰もがその説明を理解できなかったが、信長は「理にかなっている」と言い、理解した）。