Yuzu Nembutsu sect of Pure Land Buddhism?

I am interested in learning more about this sect of Japanese Pure Land Buddhism. However, contrary to what is available on Jodo Shu, Jodo Shin Shu and even the Ji sect - or Ippen, at least, I have found almost nothing. There is a smattering of info in The Foundations of Japanese Buddhism by the Matsunagas, but otherwise I have found on fragments of info on the Internet.

Just a chance, but has anyone out there come across anything else? (In English, by the way.)