Yu Yu Hakusho The Spirit Detective Episode 2 Koenma Appears ( Air Date 1992-10-17 ) Genre Animation, Action & Adventure, Sci-Fi & Fantasy category. Overview "Pulled by the sprightly, pink-robed Botan, Yusuke enters a realm that is not quite normal -- the Spirit World. There, Yusuke meets Koenma, a 700 year-old ruler with the body of a toddler, pacifier and all! But there's no rom for laughs as Koenma gives Yusuke an ordeal to restore his life. Hatching a Spirit Beast!".