James Masayoshi Mitose: History, Influence, and Controversy in Modern Kenpo By Michael Mulvihill

Introduction

James Masayoshi Mitose occupies an important and controversial place in the history of modern Kenpo. During the 1940s in Hawaii, he taught what he described as Kenpo Jiu-Jitsu, an art he said came from the Kosho-ryu tradition of Japan. Among those associated with his school was Professor William K. S. Chow, who later developed what became known as Chinese Kempo Karate. Chow in turn taught Ed Parker, who first taught Kenpo Karate and later created the highly systematized art known as American Kenpo.

Today, Kenpo-derived systems are practiced throughout the world in forms that have evolved far beyond their early Hawaiian roots. Yet the modern story of Kenpo still returns, again and again, to the figure of James Mitose. To study Mitose is to study a turning point in martial arts history: the point at which immigrant experience in Hawaii, Japanese cultural inheritance, practical self-defence, and modern martial reinvention began to merge into something new.

Mitose is not a simple figure. His influence is significant, but the claims surrounding his lineage, teachings, and final years remain contested. His life stands at the uneasy intersection of documented history, martial tradition, and posthumous interpretation. That is precisely what makes him important.

Japanese Hawaii and the World That Formed Mitose

James Masayoshi Mitose was born in Hawaii to Japanese parents, and his story cannot be understood apart from the larger story of Japanese migration to Hawaii. Before 1868, Japan was under Tokugawa military rule, and emigration was heavily restricted under the policy commonly known as sakoku. There was therefore no substantial Japanese diaspora in Hawaii before the late nineteenth century.

That changed with the transformation of both Hawaii and Japan. As sugar and pineapple plantations expanded across the Hawaiian Islands, plantation owners increasingly relied on imported labour. Native Hawaiians often resisted plantation work, seeing it as degrading and exploitative, so commercial interests turned outward for workers. At the same time, the Meiji Restoration of 1868 transformed Japan. Rapid modernization, industrial change, and rural hardship displaced many people from traditional ways of life. Emigration offered one path toward survival and opportunity.

In 1868, the first official Japanese immigrants arrived in Hawaii. They became known as the Gannenmono, or “first-year people,” because they came in the first year of the Meiji era. They were part of what later came to be called the Issei, the first generation of Japanese immigrants. Many more followed from prefectures such as Kumamoto, Fukuoka, and Kagoshima.

Mitose belonged to the next generation. He was a Nisei, a second-generation Japanese American, but he was also associated with the Kibei experience: those born in the United States, sent to Japan for education, and later returned. This experience is crucial to understanding him. Kibei often lived between two identities. They could return to Hawaii carrying Japanese language, discipline, and cultural habits into a society that saw them as both insiders and outsiders.

Mitose’s father, Sukichi Mitose, and his mother, Tome Mitose, came from Kumamoto Prefecture. Like many Japanese immigrants, they were shaped by rural poverty, debt, land pressure, and limited opportunity. Mitose later claimed that his family descended from samurai in Kumamoto, a region with strong martial associations. That claim remains part of Mitose family tradition, though independent documentary proof is difficult to establish. It should also be remembered that after the Meiji Restoration many former samurai families lost status and entered ordinary civilian life, including agriculture.

James Masayoshi Mitose was born in 1916 in Kailua-Kona on the island of Hawaii. Later Kosho-ryu circles would also regard his sister Fusae Mitose as an important family figure. Within those circles she strongly maintained that William Chow had indeed been a student of James Mitose, a point that later became part of the larger lineage debate.

Japan, Kumamoto, and the Problem of Kosho-ryu

As a young man, Mitose spent formative years in Kumamoto Prefecture on the island of Kyushu. He would have lived there during the Taisho and early Showa periods, in a society shaped by discipline, hierarchy, education, and increasing militarization. Schools emphasized moral training, obedience, physical conditioning, and patriotic duty. Kumamoto also stood within a broader Japanese martial culture in which judo, kendo, and older fighting traditions remained culturally significant.

Mitose later claimed that while in Kumamoto he studied a family or temple-linked art called Kosho Shorei-Ryu Kenpo, or Kosho-ryu Kenpo. He associated this system with an older religious and martial transmission. Yet this is where the historical ground becomes less stable. Historians and martial arts researchers have long noted that clear documentary evidence for a formal public Kosho-ryu institution in Kumamoto is difficult to establish.

This difficulty does not necessarily prove invention. It may suggest instead that whatever Mitose inherited, if he did inherit something, belonged more to private transmission, family teaching, or a hybrid body of practices and ideas than to a publicly documented school in the modern sense.

In his 1953 book What Is Self-Defense? Kenpo Jiu-Jitsu, Mitose wrote in a style that blended technical instruction, historical claim, spiritual symbolism, and philosophical reflection. He referred to Bodhidharma and sacred transmission narratives in language that sounds historically uncertain if taken literally. Yet this mode of writing was not unusual in martial arts literature. Myth, ethics, self-presentation, and combative teaching were often intertwined. For that reason, Mitose’s writings are best read not as straightforward academic history, but as a mixture of martial philosophy, cultural memory, and lineage narrative.

What Mitose Taught

Whatever the uncertainties surrounding his claimed origins, Mitose did present a coherent martial vision. In What Is Self-Defense? he described Kenpo as more complete than other systems of self-defence and as governed by its own distinct principles.

The techniques he outlined included responses to grabs, lapel grabs, wrist holds, punches, clubs, and knife threats. The method emphasized direct striking, economical motion, low kicking, rapid follow-up, and close-range practicality. At the same time, it also contained an unmistakably circular element: yielding, redirecting force, bending with motion, and using the opponent’s movement against him. These features help explain why Mitose’s teaching appeared distinctive to students and why it later proved so influential.

He also framed the art morally. He did not present Kenpo merely as a means of defeating another person. He presented it as a discipline of restraint. Even where self-defence required force, he insisted that one remained morally responsible for how that force was used. His emphasis on the sanctity of life, the concealment of power, and the avoidance of unnecessary violence became central to his public image.

One of the more striking symbolic expressions of this ethic was the salutation known as Hiken, in which one hand covers the fist. This symbolized the idea that martial skill should be concealed, not flaunted. In Mitose’s conception, the fist was to remain hidden until necessity required its use.

Return to Hawaii and the Formation of Hawaiian Kenpo

Mitose returned to Hawaii in 1936. In many ways he may have felt like a man returning home and yet still standing slightly apart from it. Though Hawaiian-born, he had been deeply shaped by Japanese education, language, and cultural discipline. As a Kibei, he stood between worlds.

This may help explain the tone of his writing. Much of it is abstract, spiritual, and ethically charged. He stressed the burden of violence, the value of restraint, and the necessity of self-control. Yet the Hawaii to which he returned was not a peaceful idyll. Honolulu in the 1930s and 1940s was a busy port city marked by class tension, racial mixing, wartime anxiety, vice, and practical roughness. Fighting skill had social value there, and martial traditions circulated in an environment shaped by real necessity.

Hawaii was also a crossroads of influences: Chinese, Okinawan, Japanese, Filipino, Hawaiian, and American. In such an environment, cross-pollination among fighting systems would not have been surprising. Whatever Kosho-ryu may or may not have been in Japan, Hawaiian Kenpo was formed under conditions of cultural mixture and adaptation.

Mitose also appears to have been associated with herbal remedies and traditional health practices. This was not unusual in immigrant communities, where Kampo-style knowledge and domestic healing traditions often circulated alongside martial instruction. Later, however, herbal practice would become entangled with the criminal case that overshadowed his final years.

Wartime Detention

After the attack on Pearl Harbor in 1941, Japanese Americans came under intense suspicion. On the mainland United States, over 110,000 people of Japanese ancestry were interned. In Hawaii, the pattern was different. There was no mass internment on the same scale, but selected community figures were detained, including priests, teachers, and individuals thought influential or politically suspect.

Mitose was detained during the war and held in internment camps. Given his Japanese language ability, Kibei background, and status as a martial arts instructor, he was vulnerable in that atmosphere. He was first held at Sand Island and later transferred to Honouliuli internment camp on Oahu. Whatever one thinks of Mitose’s later lineage claims or personal conduct, this period forms an important and undeniable part of his biography. He lived through the trauma of wartime detention as a Japanese American in Hawaii.

The Beretania Mission YMCA and the Rise of Modern Kenpo

After the war, Mitose resumed teaching. He taught at the Beretania Mission YMCA in Honolulu, and this phase proved decisive in the emergence of Hawaiian Kenpo. His school stood near working-class districts, Chinatown, and rougher social environments that shaped much of Honolulu life. It was here that his teaching reached figures who would later play major roles in the development of Kenpo and related systems.

Students associated with Mitose’s Hawaii years include Thomas Young, William K. S. Chow, Arthur Keawe, Paul Yamaguchi, and Jiro Nakamura. The precise nature of these teacher-student relationships remains debated in some cases, but there is little doubt that Mitose’s school was a significant node in the development of early Hawaiian Kenpo.

At some point, Mitose left Hawaii and turned the school over to Thomas Young. Why he withdrew from public teaching is not entirely clear. Later accounts suggest disappointment with students who failed to pursue the philosophical side of the art. Others imply a broader disillusionment with the direction of martial culture. There are also stories of violent incidents involving figures connected to this circle, including the killing of George Young in a confrontation involving Arthur Keawe, though the details survive more as oral tradition than as clearly documented history.

Whatever the disputed details, the foundations of modern Hawaiian Kenpo had been laid by the time Mitose stepped away.

Quanfa, the Octagon, and Moral Restraint

By the early 1950s Mitose had defined his martial philosophy in print. He used the term Quanfa, or “law of the fist,” to describe a system grounded not merely in combat, but in natural law, timing, leverage, balance, gravity, and moral responsibility. The fist, in this conception, was not to be displayed carelessly. It was to remain concealed and to appear only when necessity demanded it.

Mitose also used symbolic and ethical frameworks such as the Octagon and the Ogami gesture. The Octagon, as he described it, represented an eightfold moral path:

Right path

Right understanding

Right imitation

Right speech

Right livelihood

Right effort

Right meditation

Right action

Whether one reads this as Buddhist influence, ethical teaching, or Mitose’s own philosophical construction, the point is clear. He did not frame Kenpo simply as a method of inflicting violence. He framed it as a discipline intended to restrain violence. He believed that bitterness, hatred, and resentment were enemies in themselves, and that the highest victory was not necessarily the destruction of another person but the preservation of life and the avoidance of conflict where possible.

Yet Mitose did not deny the severity of the art. As he described it, Kosho-ryu contained damaging blows, close striking, destructive potential, and serious combative knowledge. What distinguished it, in his own telling, was not softness, but control.

Mainland America and Private Teaching

On the American mainland, Mitose appears to have taught more privately than he had in Hawaii. Accounts from later students suggest that he preferred selective instruction rather than large public classes. One of the names associated with this period is Nimr Hassan, who described a teacher emphasizing observation, balance, practical structure, and personal responsibility.

According to Hassan, Mitose would sometimes demonstrate material briefly, leave the student alone to work, and return later. The method forced the student to pay attention and solve problems rather than merely imitate. Hassan also recalled Mitose’s use of the makiwara and his insistence that self-defence should not depend on elaborate chains of motion or needless injury to training partners. This image is broadly consistent with the themes in Mitose’s writings: economy, balance, restraint, and efficiency.

Some writers have argued that whatever its claimed family roots, Mitose’s art shows signs of Okinawan karate influence. They point to the use of Naihanchi kata, the emphasis on close-range fighting, the makiwara, and wider similarities with Okinawan-Japanese combat traditions. Motobu Choki is sometimes mentioned in this context because of his own practical emphasis. These comparisons are worth noting, though they should be treated cautiously. It is safer to say that Mitose’s art appears to share features with Okinawan karate and Japanese jujutsu traditions than to claim a direct, proven line of influence in every respect.

The Criminal Case and the Destruction of Reputation

The final chapter of Mitose’s life is also the most troubling. In 1974, he became involved in a serious criminal case in California. He was convicted in connection with the killing of Frank Namimatsu and linked to extortion-related charges. The case resulted in a life sentence.

This episode permanently altered the way many martial artists viewed him. Supporters later argued that the case relied heavily on testimony from the admitted killer, Terry Lee, who received a lighter sentence after cooperating. Others raised questions about language barriers and the clarity of testimony. Yet whatever debate remains around the circumstances, the legal result is plain: Mitose was convicted, imprisoned, and his public reputation was severely damaged.

This also affected his standing within Kenpo. Some former students distanced themselves from him. William K. S. Chow later denied that Mitose had been his instructor and emphasized learning instead from his father. Others continued to maintain that Mitose had played a decisive role in the formation of the line from which Chow emerged. Here again, Mitose’s legacy becomes difficult to separate from controversy.

He spent his final years in prison, including time at Folsom. His health deteriorated; he suffered from diabetes and serious eyesight problems. He died in prison in 1981.

Folsom, Late Influence, and the Fragmentation of Authority

Mitose’s imprisonment did not end debate over his art. If anything, it intensified it. Following his death, Kosho-ryu fractured into competing claims of authority. It is not entirely clear whether that division was caused primarily by his criminal downfall, by his earlier withdrawal from public teaching, or by deeper ambiguities in the origins and transmission of the system itself. Most likely, all three played a role.

One claimant to authority was Mitose’s son, Thomas Barros Mitose, who asserted that grand mastery in Kosho-ryu must follow bloodline. From this perspective, inheritance rather than technical transmission became the basis of legitimacy. Yet this claim raises difficult questions. If authority rests solely on bloodline, then training, knowledge, and demonstrable transmission become secondary. The art begins to resemble inheritance more than practice.

A very different line of claim emerges through Bruce Juchnick, who visited Mitose during his imprisonment at Folsom after being introduced through George Santana. Juchnick later claimed that Mitose granted him Menkyo Kaiden and entrusted him with preserving the art. Whether one accepts that claim fully or not, it is clear that prison-era visitors became central to the later reconstruction of Mitose’s legacy.

Accounts from Juchnick, Santana, Eugene Sedeno, and others suggest that Folsom was less a place of physical martial training than of conversation, interpretation, and selective transmission. Visitors described discussions of principle, timing, humility, movement, and healing rather than open physical instruction. This matters. It suggests that whatever “late Mitose transmission” occurred in prison was likely mediated through speech, memory, referral, and interpretation rather than through the ordinary functioning of a dojo.

That distinction is important, because it helps explain why posthumous claims multiplied. A system spoken more than shown is especially vulnerable to fragmentation. Authority becomes difficult to establish cleanly.

Prison-Era Recollections and the Shape of Late Kosho-ryu

Eugene Sedeno, among those who visited Mitose in prison, described him as deeply spiritual and concerned with the future of the art. Sedeno recalled Mitose’s use of the octagon as a way of understanding the body and motion. He described an emphasis on intercepting attacks early in their arc, before they had fully developed leverage, and on understanding what lay behind a technique rather than merely copying its outer form.

George Santana also became an important witness in later accounts. A serious martial artist in his own right, Santana was cited as someone who regarded Kosho-ryu as distinctive in principle and not easily reducible to other systems. Again, these are recollections, not neutral documentation, and they should be treated as such. Still, they are important because they reveal how late followers understood Mitose and what they believed they had inherited from him.

These prison-era accounts repeatedly circle certain themes: humility, restraint, natural motion, structural understanding, the need to remove ego from learning, and the idea that the art was meant to preserve rather than glorify violence. That does not mean every later claim made in Mitose’s name is historically reliable. It does mean that a recognizable philosophy continued to be associated with him.

The Kosho-ryu Origin Narrative

At this point, the evidence becomes thinner and more internal to Kosho-ryu tradition. Later exponents such as Bruce Juchnick presented extended origin narratives for Kosho Shorei-Ryu, tracing it back centuries through temple-linked and quasi-monastic history. These accounts include figures, places, and events that are difficult to verify independently and should therefore be treated not as established history, but as lineage tradition.

That distinction matters. Such narratives may still have cultural and interpretive value. They can tell us how adherents understood the meaning of the art, even where they do not satisfy modern historical standards. In that sense, the Kosho-ryu origin story belongs to the history of martial belief as much as to the history of martial fact.

Principles Attributed to Kosho-ryu

What emerges more consistently across later accounts is not a stable institutional history, but a cluster of principles. Kosho-ryu, as described by Mitose and later interpreters, emphasized hyoshi (timing), ma-ai (distancing), position over fixed stance, and intelligent repositioning over direct collision. The art was often described as an “escaping art,” one concerned with evasion, angle, and the disruption of an opponent’s structure rather than force against force.

A recurring principle was simple: the body follows the head. This idea functioned both physically and conceptually. Direction leads movement. To move correctly, one must first perceive clearly. To perceive clearly, one must remove ego. In that sense, Kosho-ryu was repeatedly presented not merely as a method of fighting, but as a discipline of perception.

The octagon concept also continued to appear in these interpretations. It was used to understand the body structurally, with attention to centre, head position, shoulder alignment, and movement off-line. Rather than meeting power head-on, the defender was to shift, match rotation, disturb balance, and create opportunity through structure and timing.

Teaching itself was also framed in a particular way. Mitose was said to have viewed the teacher like a physician: diagnosing the student, adapting to the individual, and communicating in a way the student could truly understand. Symbolic language tied bodily structure to natural forms: pine as spine, bamboo as midsection, ribcage as structure, palm as connection. Whether taken literally or metaphorically, such imagery reflects an effort to describe motion through natural law rather than theatrical technique.

Legacy

James Masayoshi Mitose remains one of the most debated names in Kenpo history. His influence on the development of Hawaiian Kenpo, and indirectly on later Kenpo systems, is too significant to dismiss. At the same time, many of the claims surrounding his lineage, his teachings, and his life remain disputed. His criminal conviction makes his legacy even harder to assess.

Yet history is not served by simplification. Mitose matters precisely because he stands at the intersection of immigration history, Japanese-Hawaiian identity, martial transmission, philosophical self-defence, and modern controversy. He belongs to that class of figures whose importance is real even when the surrounding narrative remains unstable.

For students of Kenpo, Mitose matters not because he offers an easy legend, but because he forces difficult questions. Where does a martial tradition truly come from? How much of lineage is transmission, how much adaptation, and how much myth? And how should one judge the legacy of a man whose historical importance remains undeniable even as the story of his life ends in imprisonment, fracture, and dispute?

What emerges from the Mitose story is not a clear and uncontested inheritance, but something more revealing: the making of modern Kenpo under conditions of migration, reinvention, loss, and argument. In that sense, James Masayoshi Mitose remains important not because his story is clear, but because it is not.

References

Azuma, Eiichiro. Between Two Empires: Race, History, and Transnationalism in Japanese America. Oxford University Press, 2005.

Bishop, Mark. Okinawan Karate: Teachers, Styles and Secret Techniques. A & C Black, 1989.

Durbin, W., and Nimr H. Hassan. The Kenpo History of James Masayoshi Mitose. Lulu, 2007.

Goodin, Charles R. Hawaiian Kenpo: The Untold Story. Lulu Press, 2013.

Juchnick, Bruce. The History of Kosho-Ryu Kenpo.

Juchnick, Bruce. “James M. Mitose Controversy.” YouTube, 2021.

Kashima, Tetsuden. Judgment Without Trial: Japanese American Imprisonment During World War II. University of Washington Press, 2003.

McCarthy, Patrick. Bubishi: The Bible of Karate. 2016.

Mitose, James M. What Is Self-Defense? Kenpo Jiu-Jitsu. Self-published, 1953.

Okihiro, Gary Y. Cane Fires: The Anti-Japanese Movement in Hawaii, 1865–1945. Temple University Press, 1991.

Pekina, James, and Larry Delano. Footnotes to Kenpo Jujutsu and the Okinawan-Te Connection to James Mitose.

Perkins, J. William Chow: The Lost Interview. Irish Karate Association, 1986.

Swift, Joe, Mark Bishop, Mike Shima, and Charles R. Goodin. The Kenpo Karate Compendium. Blue Snake Books, 2011.

Takaki, Ronald. Strangers from a Different Shore: A History of Asian Americans. Little, Brown and Company, 1989.

Web and media sources: “James Mitose – Martial Arts Radio,” Episode 143.

Silver Anniversary Edition, What is True Self-Defense? 1981.

“James Mitose Conman or Genius” (2025), Social Gelo.

“James Mitose Legendary Heir to the Grand Master or Grand Fraudster” (2026), Abram Rusady.

“The Legacy of James Mitose: The True Story of Kosho Ryu,” Dr Brian Garrett, Sports Kinesiology.

“Hanshi Bruce Juchnik and Sei Kosho Kai International,” Coffee and Martial Arts.