Biographical Profile
Teacher, Researcher and Transmitter of Musō Jikiden Eishin-ryū
Iwata Norikazu Hanshi was one of the most important figures in the preservation and transmission of Musō Jikiden Eishin-ryū during the twentieth century. His significance lies not only in the high ranks he attained within Japanese iaidō and kendō, but especially in the extraordinary work he carried out over several decades to study, compare and preserve the Tosa iai tradition associated with the teachings of Ōe Masamichi.
He was born on 16 September 1913 in Mitoyo District, Kagawa Prefecture, on the island of Shikoku. His name, written 岩田 憲一, should be read as Iwata Norikazu. Although the characters 憲一 admit other readings, and different forms have appeared in some Western sources, Norikazu was the reading used by the teacher himself.
His involvement in the martial arts began in his youth. His father had experience in Yōshin-ryū jūjutsu and initially guided Iwata towards the practice of kendō. During his school years, he studied this discipline and also received instruction in iai, particularly Ōmori-ryū, under Fujimura Yonetsugu. In 1933, he attained 3rd Dan in kendō and, for a short period, served as assistant to the kendō instructor at his former school.
That same year, he entered the Japanese Army and was posted to Manchuria. He later served as a member of the Japanese military police and was also involved in training duties within that organisation. During this period, he encountered different forms of budō and, according to his own account, briefly received instruction from Ueshiba Morihei, later known as the founder of aikidō.
The end of the Second World War brought a profound interruption to his path. Following Japan’s surrender in 1945, he was captured by Soviet forces and remained interned for several years. He did not return to Japan until December 1949. Upon his return, he rebuilt his professional life and gradually resumed the practice of kendō and iai.
The Search for the Iai of Tosa
After the war, Iwata began studying with Kōda Morio, a practitioner trained at the prestigious Budō Senmon Gakkō in Kyoto who had been exposed to the teachings of Ōe Masamichi. However, Iwata soon came to understand that, if he truly wished to explore Ōe’s transmission in depth, he would have to travel to Kōchi and study with the teachers who had been his direct disciples.
This purpose would shape the rest of his life.
In 1957, he came into contact with three important representatives of Tosa Musō Jikiden Eishin-ryū: Fukui Harumasa, Yamamoto Takuji and Taoka Tsutau. After formally requesting acceptance as a student, he began an intensive period of training in Kōchi.
His principal teacher during these years was Yamamoto Takuji, a direct disciple of Ōe Masamichi. Every week, Iwata travelled from Kagawa to Kōchi to receive instruction. The journey required several hours by train, and the training sessions could last for five or six hours.
The instruction followed a traditional method. During the first few months, Yamamoto performed the techniques and expected Iwata to learn primarily through observation and repetition. Verbal explanations were initially scarce. Iwata devoted approximately one year to the intensive study of Seiza no Bu before progressing to the subsequent series.
His training was not limited to Yamamoto. During these sessions, he also received guidance and corrections from teachers such as Fukui Harumasa, Taoka Tsutau and Shimazaki Teruyuki, all of whom belonged to the technical milieu of Tosa. After approximately three years, he had learned the fundamental forms of the transmission he was studying. Nevertheless, he refused to regard his training as complete and continued travelling to Kōchi for several more years.
This period proved decisive because Iwata became interested not only in the performance of the waza, but also in their history, their principles and the differences among the various disciples of Ōe Masamichi.
Yamamoto Takuji and Mori Shigeki
Iwata always regarded Yamamoto Takuji as his most important technical influence. He described Yamamoto’s iai as particularly dynamic and acknowledged that this quality had profoundly shaped his own practice.
In 1972, however, he began a second relationship of study of exceptional importance with Mori Shigeki, another former direct disciple of Ōe Masamichi.
Mori had studied with Ōe for many years and represented, for Iwata, an exceptional source of knowledge regarding the pre-war Tosa tradition. Iwata visited him regularly for approximately sixteen years, until Mori’s death in 1988.
The teachings of the two masters were not identical. These very differences led Iwata to raise a fundamental question: to what extent did the forms practised decades later correspond exactly to those taught by Ōe Masamichi?
Rather than ignoring the differences between lines of transmission, he decided to study them.
Iwata stated that he had received Menkyo Kaiden from both Yamamoto Takuji and Mori Shigeki, placing him in an exceptional position from which to compare two transmissions deriving directly from disciples of Ōe.
A Life Devoted to Researching the Tradition
This was probably Iwata Norikazu’s most important contribution to Musō Jikiden Eishin-ryū.
Iwata understood that preserving an old tradition did not mean merely repeating forms handed down from teacher to student. Ōe Masamichi had died in 1927, and his teachings had been distributed among different disciples. Over the following decades, technical differences, individual interpretations and modifications had emerged.
Iwata attempted, as far as possible, to reconstruct the fundamental principles of that original teaching.
To achieve this, he combined direct practice with intensive historical research. He consulted senior practitioners from Tosa, collected oral testimony, compared the teachings of different disciples of Ōe, examined old documents, and studied historical publications and recordings.
His work therefore extended far beyond the simple collection of kata. He sought to understand the riai: the technical and combative rationale that gave meaning to each movement.
From the 1960s onwards, he also began publishing articles on iai and budō. For several years, he wrote regularly for the Nippon Budō Shinbun, raising technical questions and attempting to encourage debate among the specialists of his time.
Decades of study later gave rise to several written works. One of the most important was Shiden Kaikō — Tosa no Eishin-ryū, developed from the notes and knowledge he had gathered during his years of study with the teachers of Kōchi. Iwata repeatedly revised this work before considering it sufficiently mature for publication.
His major work of maturity appeared in 2002:
古流居合の本道―〈全解〉無双直伝英信流
Koryū Iai no Hondō — Zenkai Musō Jikiden Eishin-ryū
In it, he brought together a substantial part of his knowledge concerning the technique, history and principles of iai. The work analyses fundamental aspects such as nukitsuke, kirioroshi, chiburi, nōtō, posture, breathing, use of the body and riai, while also addressing the historical development of the tradition.
His Conception of Iai
For Iwata, learning should always begin with a solid understanding of kihon. Practitioners had to learn correctly how to hold the sword, how to use the body and how to coordinate the different technical elements before concerning themselves with more advanced matters.
He attached fundamental importance to Seiza no Bu, not only for beginners but also for experienced practitioners. He believed that returning regularly to the fundamentals was essential in order to prevent technique from deteriorating over the years.
As training progressed, students had to learn to use koshi, hara and tanden in an integrated manner, allowing movement to arise from the whole body rather than from the arms alone.
At higher levels, execution had to transcend conscious concern with every technical detail. Intention, spirit, perception of the opponent and riai had to become naturally integrated into movement.
Iwata was also critical of an excessively aesthetic approach to iai. He believed that the beauty of a technique should not be separated from its martial functionality. For him, the old forms retained a character close to iaijutsu, in which every movement responded to a specific situation involving an opponent and called for variations in speed, angles, and defensive and offensive actions with the iaitō.
For this same reason, he warned against the premature mixing of different schools. Practitioners should understand their own tradition in depth before beginning to compare it with, or incorporate elements from, other systems.
Recognition within Japanese Budō
Iwata attained important distinctions within the Zen Nihon Kendō Renmei.
In iaidō, he attained 8th Dan in 1976 and received the title of Hanshi in 1983. In kendō, he attained the rank and title of Kyōshi, 7th Dan.
These distinctions demonstrate that his career did not develop outside the structures of contemporary Japanese budō. On the contrary, Iwata participated actively in the modern institutions of kendō and iaidō, although in his later years he increasingly focused his teaching on preserving the traditional Musō Jikiden Eishin-ryū that he had received from his Tosa teachers.
In Kagawa, he taught for many years at his Hōnan Juku and was closely associated with Zenkoku Rōshūkai, an organisation dedicated to the transmission of this tradition.
Throughout his life, he taught numerous Japanese practitioners and, especially from the 1990s onwards, his influence began to spread beyond Japan. He travelled to the United Kingdom to teach seminars and regularly received foreign practitioners in Japan who travelled there expressly to study with him, including Master Ricardo Sanz, Renshi, 5th Dan.
His transmission is now present in various organisations and groups in Japan, Europe and the United States. These include lines associated with Rōshūkai and Shigetsu-kai, whose name derives directly from the gō used by Iwata: 士月 — Shigetsu.
His Place in the Genealogy of Musō Jikiden Eishin-ryū
In some Western sources, Iwata Norikazu has been presented as the “19th-generation headmaster” or even as the “19th sōke” of Musō Jikiden Eishin-ryū.
Iwata himself identified Fukui Harumasa as the 19th sōke and Kōno Hyakuren as the 20th sōke within one of the school’s lines of succession. After Ōe Masamichi, Musō Jikiden Eishin-ryū developed several lines of transmission, meaning that the numbering systems subsequently used do not always coincide.
For this reason, it is historically more accurate to describe Iwata Sensei as Menkyo Kaiden of Musō Jikiden Eishin-ryū, Hanshi 8th Dan in iaidō, Kyōshi 7th Dan in kendō, Kaichō of Zenkoku Rōshūkai, and one of the foremost modern researchers and transmitters of the Tosa iai that derived from the direct disciples of Ōe Masamichi.
Death and Legacy
Iwata Norikazu died on 1 January 2011, at the age of 97.
His death brought to a close a martial journey that had spanned virtually the entire Japanese twentieth century: from budō before the Second World War to the international expansion of iaidō in the twenty-first century.
His historical importance lies particularly in his role as a bridge between generations. Iwata was able to study directly with men who had received the teachings of Ōe Masamichi, one of the key figures in the modern formation of Musō Jikiden Eishin-ryū. Through Yamamoto Takuji, Mori Shigeki, Fukui Harumasa, Taoka Tsutau and other Tosa practitioners, he gained access to different perspectives on that transmission.
His contribution, however, went beyond merely receiving those teachings. He compared them, investigated their differences, searched for historical documentation, questioned senior teachers and recorded a substantial part of his conclusions in writing.
For this reason, Iwata Norikazu should be regarded not only as a distinguished teacher of iaidō, but also as one of the foremost transmitters and researchers of Tosa Musō Jikiden Eishin-ryū during the twentieth century.
His legacy demonstrates that a martial tradition is not preserved simply through the external repetition of its forms. It requires constant practice, knowledge of its foundations, understanding of its history, and rigorous research capable of distinguishing between what belongs to the received transmission and what later generations have introduced.
In this work of preserving, studying and transmitting the legacy of Tosa iai, Iwata Norikazu Hanshi occupies an exceptional place—one whose work can now be continued within the Seibukan martial arts school, Seibukan Budō - International Seibukan Budō Federation [SBIF].
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