ヤマタノオロチ

An ancient monster who has eight independent heads. She was sealed for 100 years but seems to have awoken recently. Boasting extremely high magical power, she seems to be the most powerful monster in the region.

Though she has sexual organs, she is unable to have children. Though she can't reproduce, she is very lustful. Located in the Yamatai Region, she requires a sacrifice every year. As the sacrifices will be licked dry by her eight heads for a full year, the sacrifices happily volunteer for the role.

After the year is up, the sacrifice will be sent back to the village and a new one will take his place. The man that returns comes back disabled and exhausted, but is not killed.