Just noticed this 3 page document was added to his website on April 7th.
Interesting information about hook types and sizes, but also a lot of fun to read the explanations for the names of the hooks.
The document is linked in the text from this web page.
テンカラ伝承毛鉤 (Tenkara denshō kebari) Tenkara Traditional Kebari ( or Lore or Folk Lore Kebari)
Also I just discovered a, new to me, Japanese phrase for Kebari Type. 毛鉤 種類 (Kebari shurui), which I guess could also translate as "kind of kebari"
It turns up a few different websites that I don’t find searching with 毛鉤 タイプ (Kebari taipu) Kebari type.