Kallenbach was born in
Amsterdam in 1943. In 1966, Kallenbach witnessed the strength of
Kenji Kurosaki, who was instructing there and decided to move to train at the main Kyokushin Dojo. He moved to Japan in 1967. Kallenbach practiced with a positive attitude. However, his great physical strength made him a difficult sparring partner for other students, causing headaches to the instructors. The only person who could contain Kallenbach was
Noboru Osawa, who was in charge of the Narimasu branch while Kenji Kurosaki was travelling to Europe. Kallenbach was pleased to have gotten such a sparring partner . After a while, Kallenbach began to want to experience something of more depth in Karate, as he grew weary of repetitive practice sessions.
Hatsuo Royama, who was recently banned from Kyokushin, due to an incident involving Kallenbach, had started to study Taikiken under
Kenichi Sawai. After Royama had told about Taikike, Kallenbach became interested and asked Royama to introduce him to Sawai. After that, he left the Kyokushin Kaikan and started practicing Taikiken under Sawai. Kallenbach continued to practice the style until he died in April 2021. ==Fighting style==