人柱

ひとばしら, じんちゅうhitobashira

noun

1. person who died for a cause
2. guinea pig (for a new product or service)
3. test subject
4. sacrificial lamb
5. early adopter
6. hitobashira
7. ritual human sacrifice by burying a living person under or near a large-scale construction project to invoke divine protection

Study it in Yanamino