Based on an indication of a relationship between an old edition and the Kirishitan-ban given by Ouchida, as well as researches on printing techniques by Osamu MORIGAMI and Tadao YAMAGUCHI, many research papers on the Japanese script version of Jesuit Mission Press have been published.
大内田による古活字版とキリシタン版の関係の指摘から、森上修と山口忠男の印刷技法についての考究から、国字本についての研究が多く出ている。