top of page

Official Mas Oyama Website

About Us

Welcome to Mas Oyama Enterprises - a hub of dedication, passion, and expertise in the world of Kyokushin Karate. Our team, comprising remarkable individuals with diverse skills and profound dedication, is at the heart of our efforts to promote and preserve the legacy of the legendary Mas Oyama.


Each member brings a unique set of experiences and talents, contributing significantly to our mission of spreading the teachings and spirit of Kyokushin Karate globally. 

Our Expert Team at Mas Oyama Enterprises

Guided by Kuristina Oyama, Mas Oyama's daughter, our mission at Mas Oyama Enterprises is deeply rooted in the rich heritage of Kyokushin Karate. Kuristina has carefully selected a team of skilled individuals from the Kyokushin community to perpetuate her father's legacy. This select group, embodying passion and expertise, works in unison to uphold the traditions and principles of Kyokushin Karate.


Together, we strive to inspire and cultivate a new generation of martial artists, bridging the past and the present to shape a future where Mas Oyama's teachings continue to thrive and resonate globally.

Our Story

At Mas Oyama Enterprises, our role extends beyond managing information, rights, and merchandise related to Kyokushin Karate. We are deeply committed to supporting the Oyama family, ensuring the continuation of Mas Oyama's legacy through various means, including donations and community support.


This commitment is underpinned by a set of core values that guide every aspect of our work. From safeguarding the intellectual legacy of Kyokushin Karate to assisting the Oyama family and engaging with the broader community, these values are the cornerstone of our approach.

What We Value

We are dedicated to preserving the rich history and teachings of Mas Oyama. Our efforts in rights management and information dissemination are focused on maintaining the integrity and authenticity of the Kyokushin Karate legacy.

Preservation of Legacy


Supporting the Oyama family is central to our mission. We provide assistance through donations, resources, and initiatives that honor their contribution to martial arts and ensure their welfare.

Family Support and Solidarity


In offering merchandise, we emphasize quality and authenticity. Our products reflect the true spirit of Kyokushin Karate, serving as a tangible connection to its revered traditions.

Quality and Authenticity in Merchandising


We strive to educate and inform the public about Kyokushin Karate. Through accessible resources and accurate information, we aim to nurture a deeper understanding and appreciation of this martial art.

Educational Engagement


Engaging with and giving back to the community is fundamental. We actively participate in community events and outreach programs, fostering a sense of unity and shared passion for Kyokushin Karate.

Community Involvement and Outreach


Upholding high ethical standards and integrity in all our activities is paramount. From managing intellectual property rights to interacting with partners and the public, we ensure transparency, fairness, and respect in all our dealings.

Ethical Practices and Integrity


Meet The Team

Kuristina Kikuko Oyama

Custodian & CEO

Born on October 21, 1971, in Toshima-ku, Tokyo, Kuristina Oyama is the third daughter of the Oyama family. Holding a Shodan rank in Kyokushin Karate, she has dedicated herself to the revitalization and growth of the Kyokushin-kaikan. Kuristina, working alongside her mother Chiyako Oyama since 1994, strives to accurately share her late father Mas Oyama's legacy and the spirit of Kyokushin Karate, both domestically and internationally. Her mission is to inspire and encourage people through her father's significant achievements and profound insights.

Kuristina has double degree in law and psychology, actively involved in various fields. She provides lectures in U.S. prisons, focusing on inmate care, among other initiatives. She has been practicing yoga since the age of nineteen, following her father Masutatsu Oyama's recommendation. Kuristina explores new forms of yoga, finding commonalities with karate, particularly in breathing techniques and physical movements. She practices Ashtanga Yoga while developing an adaptive yoga method that complements the Kyokushin Way, offering personalized programs for individuals and groups alike.

Social Media


Born in 1974 in Nagasaki, Leo is the head of the production department. As an office worker, he passionately researches Mas Oyama and Kyokushin Karate in his free time. His findings contribute to books and magazines, enriching the knowledge base of martial arts. Leo also runs the blog "Eye of the Fist."


However, due to server migration and domain changes, many images on the blog are currently disconnected, and repairing them has been a challenging task. Leo, a person of diverse interests, often shares intriguing research snippets on social media platforms like Twitter.



Born in 1985 in Berlin, Germany, Son has made a mark as a marketer, notably advancing brand development through targeted campaigns on Google and social media. His martial arts journey began in 2008 with Kyokushin Karate in Bremen. Today, he practices and upholds the traditions of Kyokushin in Berlin.


His dedication to Kyokushin Karate not only reflects his commitment to martial arts but also honors the legacy of Oyama Masutatsu, serving as a bridge between traditional martial arts values and modern-day practices.



Waleri has excelled as a financial expert, notably enhancing financial operations for various organizations. He practices and upholds the traditions of Kyokushin as a 2nd Dan Black Belt International Instructor under the Ushakov Branch in Germany.

As the Financial Treasurer of Mas Oyama Enterprise, Waleri combines his financial acumen with his dedication to Kyokushin Karate, honoring the legacy of Oyama Masutatsu by integrating traditional martial arts values with contemporary financial practices.

bottom of page