What I also like about this hack, in addition to it being simple and evocative of karmic themes, is also how the mechanics lend themselves to organic worldbuilding. The features of the Kami-Gods, Demons, and Great Forest Spirits flesh out the world and give players motivations, as do the curses, and one could easily build a campaign just from that.
Given how much I appreciated hmmmarquis' work on this, I decided to code up an automatic generator for it! From this, you can create 1st level characters, Kami-Gods, Demons, Great Forest Spirits, Benign Spirits, and God-Curses. In later versions I would like to make it more flexible, like picking specific classes or allowing higher level characters.
Generators for Revelations of the Mononoke Princess by hmmmarquis.blogspot.com
NOTE: Characters are assumed to be level 1, have HD of 1d6, AC starts at 9 and is THAC0, and stats may be modified by class. For Monk, AC assumes no armor.
Choose a character type
Generate a RotMP character:
Generate a God-Curse: