The Japanese word for "Bipalium" is kougaibiru コウガイビル.
- A traditional Japanese way to tie a woman's hair with a "hairpir," kougai 笄, ressembles the Hammerhead Worm's hammerhead.
Hammerhead Worm, Broadhead Planarian.
Scientific name: Bipalium.
Beware: some kanji that are difficult to handwrite are easy to type on the computer, which may skew the usage statistics.