Kanazawa Hirokazu (金澤弘和, b 1931) is a world renowned shotokan karate instructor.

Sensei Kanazawa is the Chief instructor and President of Shotokan Karate-do International Federation, an organization he himself founded after he left the Japan Karate Association (JKA). Sensei Kanazawa is one of the few masters to have achieved 10th Dan (the highest rank that can be awarded to a Shotokan karateka) and is also the only living person holding that rank.

Wikipedia states...

Kanazawa won the very first ‘All Japan karate Championship’ Kumite championship in 1957. He had registered in the kumite competition with a broken hand from a prior event, but not wanting to disappoint his mother who had traveled from far away to watch him compete, he fought anyway and won the title. The following year, Kanazawa won the Kata title and shared the Kumite title with Takayuki Mikami in one of the most spectacular moments in Shotokan tournament history. Mikami and Kanazawa had been classmates and roommates for the entirety of their karate careers, but had never fought the previous year because Mikami was away teaching in the Philippines for two years. When they fought one another in the final round, very few techniques were thrown, they knew each other too well. They circled searching for openings until time was up. For that reason, it was decided that both instructors were All Japan Kumite Champions for 1958.

There are numerous books he has published and those listed below are available in English:

Kankudai Kata: Karate(1969) London: Paul H. Crompton. ISBN 978-0901764027.
Stronger Karate in Six Weeks (1978)
Shotokan Karate International Kata, Volume 1 (1981)
Shotokan Karate International Kata, Volume 2 (1982)
Nunchaku : Dynamic Training (1984)
Dynamic Power of Karate (1986)
Shotokan Karate International Kumite Kyohan (1987)
Karate My Life (2003)Kendo World Publications. ISBN 978-4990169428.
Karate Fighting Techniques: The Complete Kumite. (2004)
Tokyo & New York: Kodansha International. ISBN 978-4770028723.
Black Belt Karate(2006)Kodansha Europe. ISBN 978-4770027757.