Preparing for teaching a class at Pennsic (my first!) on Japanese heraldry, I’ve been gathering some good sources for figures. One of the best primary sources for Sengoku-era heraldry is O-umajirushi, a collection of heraldic displays printed somewhere in 1624–1644. Contrary to some sources, all six scrolls still exist, and I just discovered they can be found online at the National Diet Library of Japan. Enjoy!