The Atsuhara Affair:

The Lotus Sutra, Persecution, and Religious Identity in the Early Nichiren Tradition by Dr. Jacqueline Stone

https://www.princeton.edu/~jstone/Articles%20on%20the%20Lotus%20Sutra%20Tendai%20and%20Nichiren%20Buddhism/The%20Atsuhara%20Affair--The%20Lotus%20Sutra,%20Persecution,%20and%20Religious%20Identity%20in%20the%20Early%20Nichiren%20Tradition%20(2014).pdf