This was a fun project, with wonderful people, that I really enjoyed doing. Thank you to Bryan Matsuoka and Janet Johnson who brought the whole thing together.
See the Koka Kids & USJF Rank Recommendations Syllabus series
This digital set of books covers the suggested requirements to go from white/yellow belt (advanced Rokkyu) through to purple belt (Ikkyu) and is available for USJF members, coaches and judoka.