Establishment of Nen-ryū — The Oldest of the Three Founding Schools of Japanese Swordsmanship

Nen-ryū is regarded as the oldest of the three great source schools of heihō (Nen-ryū, Kage-ryū, and Shintō-ryū), and it is a historical school that had a broad influence on later swordsmanship schools. The life and swordsmanship of its founder, Nen-ami Jion, laid the ideological and technical foundations for later swordsmen.

Life of Nen-ami Jion and the Founding of the School

Nen-ami Jion was born in 1350 (Shōhei 5 of the Southern Court; Kannō 1 of the Northern Court) as the son of Sōma Saemon-no-jō Tadashige, a samurai of Ōshū Sōma. His secular name was Sōma Shirō Yoshimoto. In his childhood his father was killed by an enemy, a tragedy that befell him, and at the age of seven he entered Shōjōkō-ji (Yugyō-ji) in Fujisawa, Sagami Province, where he received the name “Nen-ami” as a Ji-shū monk.

He is then said to have received instruction in swordsmanship from a strange, mysterious figure while training at Mount Kurama in Kyoto. There is a legendary tradition that this figure was a tengu or a being like a sage. Around the age of sixteen, he is further said to have received the secret teachings of swordsmanship from Eiyū, a holy monk of Jufuku-ji in Kamakura. In the 5th month of Ōan 1 (1368), during training at Anraku-ji in Tsukushi, Kyushu, he is said to have attained the “secret essence of the sword,” and this has been handed down as the core moment in the founding of Nen-ryū.

Afterward, Jion returned to lay life, took the name Sōma Shirō Yoshimoto, and used the sword skills he had honed to avenge his father. After the vendetta was accomplished, he returned to the Buddhist priesthood and changed his name to “Jion.” He then traveled through various regions and began teaching swordsmanship. In his later years, in Ōei 15 (1408), he is said to have founded Chōfuku-ji in Namiai village, Shinshū, and to have styled himself “Nendai Oshō,” continuing his training and teaching until his death.

Technical Features and Philosophy of Nen-ryū

The name Nen-ryū is said to derive from its basic principle of prevailing chiefly through single-minded focus (ichinen). Its teaching is symbolized by the saying, “If your right hand is cut off, press on with the left; if both hands are gone, bite on and still carry it through with single-minded resolve.” It is a swordsmanship that places absolute concentration of mind and unyielding fighting spirit at its foundation.

In terms of technique, practitioners were required to develop enough strength to hold a sword with a bale of rice hung from its tip, along with rapid thrusting ability. Beyond swordsmanship, the transmitted repertoire is said to include kusarigama, staff techniques (bōjutsu), and restraint techniques (hobakujutsu), and it was organized as a comprehensive martial arts system.

Its spiritual foundation was deeply influenced by Buddhism, including Ji-shū and Zen. “Ichinen” corresponds to the Buddhist concept of mental power (nenriki) and single-minded concentration. Jion’s pursuit of swordsmanship while holding a monastic registration can also be seen as a pioneering expression of the martial philosophy of the “unity of sword and Zen” of the time.

Disciples and Successor Schools — The Core Lineage of Japanese Swordsmanship

Jion is said to have had fourteen outstanding disciples known as the “Fourteen Sages,” and each of them founded a school in their own region. The main disciples and successor schools are as follows.

Chūjō Nagahide received the secret teachings of Nen-ryū and founded Chūjō-ryū. Chūjō-ryū was a school transmitted by the Chūjō clan, who were active as attendants to the Muromachi shogunate, and its technical refinement had a major influence on later swordsmanship schools. Chūjō-ryū further developed into Toda-ryū, and from Toda-ryū, Itō Ittōsai founded Ittō-ryū. Ittō-ryū became one of the most flourishing swordsmanship schools throughout the Edo period, giving rise to many branches, including Ono-ha Ittō-ryū and Hokushin Ittō-ryū.

Higuchi Tarō Kaneshige of Jōshū is also counted among Jion’s disciples (Higuchi Nen-ryū). Later, Higuchi Sadatsugu of the Higuchi family learned Nen-ryū from Tomomatsu Gian, the seventh head of Nen-ryū, and in Tenshō 19 (1591) he succeeded as the eighth head. Thereafter, the Nen-ryū transmitted within the Higuchi family came to be called Maniwa Nen-ryū. Maniwa Nen-ryū still maintains a dojo in Takasaki, Gunma Prefecture, and continues to uphold a tradition of more than 400 years.

In addition, Kai Chikuzen-no-kami transmitted the lineage that became the basis of Toda-ryū, and Nikaidō Uma-no-suke founded Nikaidō-ryū. In these ways, Jion’s disciples spread Nen-ryū techniques to various regions.

The Historical Significance of Nen-ryū — As One of the Three Great Source Schools

The concept of the three great source schools of heihō (Nen-ryū, Kage-ryū, and Shintō-ryū) was organized in later times. Nen-ryū was placed at the head of the list because of its historical priority and the breadth of its influence on later schools.

The Nen-ryū system of swordsmanship, established during the Muromachi period (late fourteenth to fifteenth century), went beyond mere combat technique and provided an ideological foundation for swordsmanship as spiritual discipline. The philosophy of katsujinken (later systematized by Kamiizumi Nobutsuna of Shinkage-ryū) and the spiritual unity of sword and Zen already show their beginnings in the life and swordsmanship of Nen-ami Jion, the founder of Nen-ryū.

Through Jion’s disciples, the Nen-ryū lineage was transmitted through Ittō-ryū and Maniwa Nen-ryū across the entire Edo period, and it is recorded in history as the wellspring of the lineage that forms the core of Japanese swordsmanship.