Shinkage Ryū Kiriai Kuden-sho no Koto
Sekishūsai gathered the oral teachings of Kamiizumi Ise-no-kami, systematized them, and set them down as Shinkage Ryū Kiriai Kuden-sho no Koto. He gave this to his grandchild, Yagyū Hyogonosuke Toshitoshi, in 1603.
This text concretely outlines Kamiizumi Ise-no-kami’s approach to heihō, the martial arts, and the art of swordsmanship.
Sekishūsai was given the inka, the “certificate of mastery” in April 1565 and was named the legitimate second headmaster. In May of 1566, he was then given the four scrolls of the Kagemokuroku: Enpi, Sangaku, Kuka, and Nanatachi.
Motsujimi Shudan Kudensho
In August of 1604, when he finished writing Motsujimi Shudan Kuden-sho (A Mind Without Strife or Selfishness), Sekishūsai appointed Toshitoshi as his successor. Sekishūsai added three more important items to the Motsujimi Shudan Kuden-sho before Toshitoshi inherited the position in June 1605 and became the third headmaster. At that time, Sekishūsai gave the Motujimi Shudan Kuden-sho to Toshitoshi along with two other scrolls: Shinkage Ryū Heihō Mokuroku no Koto, and Shinkage Ryū Kiriai Kuden-sho no Koto. Sekishūsai was 77 and Toshitoshi was 28 years old.
Owari Gondainagon Tokugawa Yoshinao, the first head of the Owari Tokugawa domain, became the fourth headmaster of Shinkage Ryū in 1620. At that time, the third headmaster, Yagyū Hyōgonosuke Toshitoshi, presented him with the Shijū Fuja-sho along with the other catalogues of techniques and teachings.
In the Shijū Fuja-sho, Toshitoshi describes heihō for armored combat. This heihō is characterized by low stances, and it was this style that the founder of Shinkage Ryū, Kamiizumi Ise-no-kami taught to Sekishūsai. In this revolutionary text, Toshitoshi further established principles for fighting unarmored, as befitting the new era after the Genna Armistice.
While it could be said that the transition from the low stances of armored combat to the free and erect postures of combat in everyday clothing, this was certainly a great achievement for Toshitoshi in the history of Japanese swordsmanship.
Shinkage Ryū Heihō Mokuroku (Renya kuden-sho)
The Shinkage Ryū Heihō Mokuroku is a collection of teachings thought to have been written by the fifth headmaster, Yagyū Renya Toshikane, where he was 12 or 13 years old. He briefly summarizes the concepts taught by the founder of the Ryū, Kamiizumi Ise-no-kami, and the second headmaster, Yagyū Sekishūsai, and provides comments on each item in the four scrolls. He discusses the technique and theory of each in terms of the “old” theory of the first and second headmasters and in terms of the “current” theory of his father, Toshitoshi. Renya sealed this text and never showed it to other people. He passed it down to his nephew, the eighth headmaster, after writing on the cover that the person who broke his seal would be killed by Marishiten, a Buddhist deity, in punishment. It is taught that the eleventh headmaster, Yagyū Toshiharu, gathered his extraordinary courage and conviction and opened the scroll, and it has illuminated the understanding of successive headmasters ever since.