In this publishing project, not only books used for the first purpose of training clergymen, but those on the Japanese versions of Jesuit Mission Press in katakana, and also the Japanese version of Jesuit Mission Press in sosho-tai (cursive style writing) kanji and kana were published.
この出版事業においては、当初の目的であった聖職者養成に用いる書物、片仮名による国字本に止まらず、草書体漢字・仮名を用いた国字本まで刊行された。