幽明 [ㄧㄡ ㄇㄧㄥˊ; you1 ming2]
  the hidden and the visible
  that which can be seen and that which cannot
  darkness and light
  night and day
  wisdom and ignorance
  evil and good
  the living and the dead
  men and ghosts
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  幽冥
  幽明
  ゆうめい
  noun (common) (futsuumeishi)
  semidarkness
  deep and strange
  hades
  the present and the other world
  dark and light
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