雁首

かりくび, がんくびkarikubi

noun

1. corona of glans penis
2. corona glandis penis
3. gooseneck (i.e. something shaped like a goose's neck)
4. head of the penis
5. glans
6. head (of a Japanese pipe, i.e. the bowl and shank)
7. neck
8. head

Study it in Yanamino