Are there really so many ghosts in Japan?

I am a research enthusiast of Japanese ghosts and gods.

There are indeed a large number of monsters (ghosts) in Japan, and ghosts are evolved from people's hearts. Just like the Japanese writer Baku Yumemakura's Yin and Yang Teacher, Abe Harumi said that "ghosts actually exist in everyone's hearts" (roughly like this).

In fact, turning people into ghosts is voluntary or what you want.

……

Japan claims to have "eight million gods"

In fact, it seems that there are only more than 1000 people, so I can't remember clearly. . .