Mabuni published a number of books on the subject and continued to systematize his instruction method. In his latter years, he developed a number of formal "kata", such as Aoyagi, for example, which was designed specifically for women's self-defense. Perhaps more than any other master in the last century, Mabuni was steeped in the traditions and history of Karate-dō, yet forward thinking enough to realize that it could spread throughout the world. To this day, Shitō-ryū recognizes the influences of Itosu and Higaonna: the "kata" syllabus of Shitō-ryū is still often listed in such a way as to show the two lineages.