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  • Profile picture of David Brezinski

    David Brezinski wrote a new post

    • 3 years, 8 months ago
    Week 27 - David Brezinski

    Sanchin (三戦) – Three Conflicts One thing I am learning over the years I have been training in karate is I have just really scratched the surface. The depth of our own Isshinryu codes and the dimensions of possi…

  • Profile picture of David Brezinski

    David Brezinski wrote a new post

    • 3 years, 8 months ago
    Week 26 - David Brezinski

    Boston Marathon 2023? Well, 2023 is stacking up to be a very exciting year! Of course, my black belt test and should I pass, it will be an accomplishment for me, like no other. I have written this before but I do…

  • Profile picture of Dirk Herfurth

    Dirk Herfurth wrote a new post

    • 3 years, 8 months ago
    Week 29 - Dirk Herfurth

    Meanwhile the One Heart Challenge is down to only David san and me. Geneva san unfortunately got injured during her practice and together with sensei Oliver she decided to continue next year. In addition Geneva san…

  • Profile picture of Dirk Herfurth

    Dirk Herfurth wrote a new post

    • 3 years, 8 months ago
    Week 28 - Dirk Herfurth

    Throwback Thursday – Part 3 The style of karate I was practicing in Germany was Shorin-ryu Shidokan. It was founded in 1948 by Katsuya Miyahira, who was a student of Chokki Motubo and Choshin Chibana. Chibana was o…

  • Profile picture of Dirk Herfurth

    Dirk Herfurth wrote a new post

    • 3 years, 9 months ago
    Week 27 - Dirk Herfurth

    Throwback Thursday – Part 2 After I finished my study in 2004 I had to move back to my parents. Job market for civil engineers in Germany was super bad at the time. Over the course of a year I wrote 300+ a…

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OneHeart Challenge

The OneHeart Challenge is a year-long quest rooted in the principles of of Isshinryu Karate–the ‘One-Heart Way.’ While some will use the challenge as part of their next rank promotion, it is so much more than a black-belt test. This challenge embodies the harmonious fusion of mind, body, and spirit.

Latest Posts

  • First Week Down June 8, 2026
  • 2nd Semester Finals June 7, 2026
  • Black Belt Week One June 7, 2026
  • The Journey Begins June 6, 2026
  • New Black Belt Candidates June 3, 2026
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