Types of 幽霊(Yūrei)

幽霊(Yūrei) are classed on how they died, and their reason for returning to the living world.

• Onryo - Vengeful ghosts who come back from the underworld vengefully, for a wrong that happened to them in their lifetime.
• Ubume - A mother who died leaving young children behind, or in childbirth. Often she returns to care for her children and may bring them sweets.
• Goryo - an aristocratic ghost, vengeful and often a martyr.
• Funayurei - Died at sea, and sometimes resemble a similar for to mermaid/man.
• Zashiki-Warashi - Ghosts of young children, often mischievous.
• Samurai - Veterans of the Genpei war.
• Seductress - A ghost who initiates a death love affair with a living human.

This is the story of an Ubume, who died while she was pregnant. 

There are also the buddhist ghosts 'Gaki' and 'Jikininki' who have unfulfilled wishes, their are different to other classifications of  幽霊(Yūrei), due to their religious nature.

In Japanese folklore, the living can release their spirit as an ikiryō 生き霊. This is a ghost that can enact, while still alive.幽霊(Yūrei) often come under the term of obake, which means 'to change' However it has been claimed that 幽霊(Yūrei) haunt a particular personal, whilst obake haunt a particular place.

In our thriller, if we choose to have a 幽霊(Yūrei), we will most likely choose an Onryo as they are vengeful or a Goryo.