Supposedly, Hyo usually gives 15 points per challenge. However, Hyo said that this one was worth 30, as he considered it special for some reason; this can be seen on the picture bellow.
I managed to find Hyo and Takofuusen in an isolated section in the Sewers, after getting caught by the Shadow Lady in 赤黒タイル通路 (Floating Red Tiles World).
I currently have 45 Hyo points!