Ushio and Tora S01 E19 The Demon That Turns Back Time

"Some families have skeletons in their closets... you won't believe what this family has in their basement!"

Once inside the cave, Ushio and Tora are carried over to the past by a time manipulating yōkai. There, they bear witness to how Hakumen no Mono first attacked the king and people of China, destroying the city and killing the parents of Jie Mei and Giryō.