Shin Musō Hayashizaki-ryū (神夢想林崎流) is a tradition of iaijutsu, the art of drawing the sword and cutting in a single, continuous motion. It traces itself to Hayashizaki Jinsuke Shigenobu, the figure conventionally regarded as the founder of Japanese sword-drawing, and it has been transmitted as a distinct line in the Tōhoku region of northern Japan.
Hayashizaki, the source of iai
Hayashizaki Jinsuke is a semi-legendary figure said to have lived in the late sixteenth century and to have conceived iai at the Hayashizaki shrine in the old province of Dewa, in what is now Yamagata Prefecture. Much of his story belongs to tradition rather than to independent record, and the honest position is to treat him as the revered source of a family of arts rather than as a fully documented historical teacher.
The decisive cut is the one already begun as the blade leaves the scabbard.
A shared ancestor
The major living iai schools, Musō Jikiden Eishin-ryū and Musō Shinden-ryū, both trace their descent to the same Hayashizaki root. Shin Musō Hayashizaki-ryū is a separate line that claims the same ancestry, and so it is best understood as a relative of those better-known schools rather than as their parent or child.
What it teaches
The art joins the draw, the cut, the clearing of the blade and the resheathing into one unbroken response, practised from both seated and standing positions. The aim is to meet a threat in the very act of drawing, so that the first movement is already the decisive one.
Honesty note
Because the founder is semi-legendary, the school's claimed antiquity rests on tradition, while its more recent transmission in the Tōhoku region is the better-attested part of its history.