The school of governing the heart-mind
Kyūshin-ryū (扱心流) is a school of Japanese jūjutsu whose name joins 扱, to handle or govern, with 心, the heart-mind, the seat of intention and attention as much as feeling. The characters are best read as the school of governing the mind rather than the "supreme jūjutsu" of later promotion, which they do not support. Transmission documents also record the forms 扱心一流, 柔術扱心流 and 扱心流躰術, and some accounts connected with the Shinjō domain use the variant 汲心流.
A founder in legend and a founder in record
The school's inherited genealogy reaches into the late Muromachi period, when a warrior of Ōmi, Inugami Sakon Shōgen Nagakatsu, is said to have learned Enshin-ryū kumiuchi from Hayami Nagato-no-kami Enshin, his descendant Kyūshinsai Nagatomo later refining the inheritance. This origin belongs to the school's traditional memory rather than to documented history. The historically firmer figure is Inugami Nagayasu, known also as Inugami Gunbei and originally as Itō Zenpachi, who studied family taijutsu under his uncle Tanahashi Gohei and then Kitō-ryū under Takino Yūken. Certified in 1735, he opened his own dojo in the Azabu-Mamiana district of Edo around 1749 and entered the service of the Arima house of Kurume in the early 1750s. The Japanese reference works disagree over his exact dates, so Ryūpedia places him only in the middle decades of the eighteenth century.
To govern the heart-mind, entering without letting attention stop on the blade.
A line carried through the domains
Nagayasu's adopted successor was Inugami Nagamasa, and the school spread through Kurume, Yanagawa and Fukuoka. A related current reached Higo through Eguchi Kichidayū Shizutoshi, who studied under Nagamasa in Edo and went on to found what became known as Eguchi-ryū. Nineteenth-century catalogues in the Kumamoto Prefectural Library preserve its transmission scrolls, among them an initial-stage catalogue of 1819, oral teachings on quiet intention, a true-mind (本心) scroll of 1829, and separate and inner transmissions, with an 扱心流躰術目録 passed from Eguchi Yazo to Kuwahara Jirōkuma in 1898.
Body method and the undivided mind
Kyūshin-ryū binds technique to an inner discipline. A surviving secret writing, the 柔術扱心流秘書, warns against forcing ki into the lower abdomen from the outset: strained effort, 力み, destroys the subtlety of a technique, and a natural centredness is expected to grow from complete, unforced practice rather than to be manufactured in advance. Its teaching on maai, the interval of engagement, is measured against the reach of a sword, so at least part of the method was framed around entering safely against a blade. The school speaks of 一気の先, initiative carried in a single impulse, and 無念無心, action free of a mind that fixes on a thought, urging the practitioner to enter directly rather than chase the weapon.
Forms, armour and restoration
Japanese preservation material describes the tradition as spanning 兵法, 組討 and 柔術 or 躰術. The form names recorded for the Nippon Budokan preservation film include 本心, 腰返, 打返, 打落, 陰落, 陽落, 大車, 陰返, 陽返, 胸取 and 胸返, with 引浪 among the 試合口 material. The paired 陰 and 陽 forms suggest complementary responses rather than one correct movement, though the surviving public record does not fix their mechanics. The writings of Noda Jintarō preserve the school's armoured grappling and its handling of weapons, and an illustrated document attributed to Eguchi Kichidayū and dated 1795 records kappō, the restorative knowledge that traditional jūjutsu kept alongside its methods of injury.
A tradition preserved but not independently listed
In 1906 Eguchi Yazo, a Dai Nippon Butokukai kyōshi, took part in formulating the standardised Butokukai jūjutsu forms, placing Kyūshin-ryū within the passage from domain traditions to organised modern budō. The Nippon Budokan recorded a nineteen-minute preservation film of 扱心一流柔術 in 1978, with Noda Jintarō as its representative. Kyūshin-ryū does not appear on the present public membership list of the Nihon Kobudō Kyōkai; Ryūpedia treats that absence as a record of its current public standing, not as proof that the tradition is extinct.