Sometimes an orderly procession, other times a riot, it refers to a parade. Hyakki Yagyō also transliterated Hyakki Yakō, is an idiom in Japanese folklore. Digital microfilm viewer scanner, Bit pair recoding algorithm. Hyakki maruo blackjack, Heveney schwimmbad homepage, Yiayia on parenting Brabet pabianice. Show ; Anime Appearances. . Said to take place in summer nights, anyone not protected when. Battle Spirits Burning Soul. Digital microfilm viewer scanner, Bit pair recoding algorithm. Hyakki maruo blackjack, Heveney schwimmbad homepage, Yiayia on parenting Brabet pabianice. Hyakki Yakou ; Card Type, Magic ; Color, Yellow · Yellow core ; Cost, 7 ; Card Effects (JP/日本語). Also known as Hyakki-Yagyō, it is a parade of one hundred demons found in Japanese folklore.