保元之亂
The original text is sometimes attributed to Hamuro Tokinaga, and is written in 36 chapters. As is the case with most other "monogatari", the text has been rewritten and revised many times over the years, and developed into an oral tradition as well. Most often, the "Tale of Heiji" would be chanted as a continuation of the "Tale of Hōgen", which relates the events of the closely related Hōgen Rebellion.