Asian Horror Encyclopedia

Abyss :
The abyss is often characterized as the underworld or the abode of the dead. This often places it underground or inside mountains. Chinese demonic tradition holds the underground is the abode of subterranean demons, as well as the world of the dead. The Japanese and the South Sea Islanders have the curious tradition of placing the abyss beneath the sea or at the bottom of lakes. This ties in with the myth of undersea cities and palaces as in the Japanese classic fairy tale "Urashima Taro," reminiscent of King Arthur's Avalon.
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Madness :
A potentially horrific state of mind. Madness can be a source of terror to the afflicted themselves and to their sane companions. Highly exaggerated as threat in popular culture, madness can be used effectively to invoke horror and modify audience attitudes towards a character.
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Rashomon :
A ghost tale of old Kyoto not to be confused with the Akutagawa short story and movie with the same name. In this tale, a man meets a young woman at Rashomon Gate, who turns out to be a ghost. He slashes off her hand, which he proudly displays to everyone. The ghost uses this pride to get her hand back.

Asian Horror Encyclopedia. (via del.icio.us/robbytherobot)