Yama King

From the White Wolf Wiki, the most complete White Wolf reference

The Yama Kings are the supreme wardens (and arguably, prisoners) of Yomi Wan. They are largely fallen servants of the August Personage In Jade who, discovering that chi could be extracted through torture, adopted torture techniques to extract chi.

Generally, the only requirement to be a Yama King is to own some real estate in Yomi Wan. While some, such as Tou Mu, are actually corrupt and fallen former judges of the dead, others are merely corrupt spirits in general (Emma-O was originally an Ainu judge of the dead made bitter and twisted by Yamato occupation of his island), and some (Haha no Fukami and Yen Lo) appear to follow their original duties to a greater or lesser extent. The Yama Kings also include beings from other places, such as corrupt mortal sorcerers (Mikaboshi) or possible Vampires (Ravana).

The Yama Kings are powerful, but they are also bound by their crimes - the oldest remember the strange smile on the August Personage's face when He turned away from them, and the wisest suspect that ultimately, they are the butt of a joke which will only be apparent at the end of time.