Hyakki Yakoo is a five-reel, payline slot from Vela. Hyakki Yakoo is a five-reel, payline slot from Vela. LeoVegas online casino has launched its own online slots game - LeoVegas Megaways! Hyakki Yakoo Slot. LeoVegas online casino has launched its own online slots game - LeoVegas Megaways! Hyakki Yakoo Slot. PLAY LEOVEGAS ONLINE CASINO GAMES SUCH AS SLOTS, BLACKJACK, ROULETTE, POKER & MORE! A welcome bonus of UP TO £ and 50 FREE SPINS is waiting for you when. . LeoVegas AB is a Swedish mobile gaming company and provider of online casino and sports betting services such as table games, video slots. LeoVegas is an enterprise organization specializing in gaming, online casinos, and sports betting, with more than 1, employees of multiple sub-companies.