Junji Ito didn’t develop these ideas – they are adapted from a book of short stories based on urban legends. The result is very well-illustrated campfire stories that you’ve heard a version of before.
The stories in the back half are better than the first few, but this is a book for Ito completists only. Unless you’re a super fan, you can safely skip this one.
Even the teenager (who is a completist) wasn’t much of a fan of this one.