https://koshinkai.tokyo/en/%E5%A4%A7%E6%9D%B1%E6%B5%81%E3%81%AE%E3%83%AB%E3%83%BC%E3%83%84%E3%82%92%E6%8E%A2%E3%82%8B6-%E6%AD%A6%E7%94%B0%E6%83%A3%E8%A7%92%E5%85%88%E7%94%9F%E3%81%A8%E5%8C%97%E6%B5%B7%E9%81%93/
Exploring the Roots of Daito-ryu (Part 6): Takeda Sokaku in Hokkaido – 大東流合気柔術幸心会
the rootsdaito ryutakeda sokakuexploringpart