Right after Yusuke talks with Hokishin, he is approached by Koenma, who is dressed as Tuxedo Mask from Sailor Moon, which is created by Naoko Takeuchi and she is married to Yoshihiro Togashi, creator of Yu Yu Hakusho.
Yomi: If your opponent has no unguarded points, you should make one.
Yomi: (thinking) I'm proud of you, son. You've fought like a true warrior. But you can never know victory until you understand the nature of defeat.
This episode originally aired in Japan on November 5th, 1994.
Japanese Episode Title: "Father and Son Battle! Yomi and Shura"
Koenma has on the full Tuxedo Mask costume, including the top hat, white sunglasses, tux and cape.
Yoshihiro Togashi, the creator of Yu Yu Hakusho, was dating Naoko Takeuchi, the creator of Sailor Moon series.