If you're looking for anime similar to Sadako, you might like these titles.
The official music video for the live-action movie Ghost Book: Obake Zukan's main theme I Wanna Be Your Ghost (feat. Ghosts), performed by Gen Hoshino.
One day, Miko suddenly started seeing grotesque beings that others couldn't. Her response was not to run, not to face them, but to do everything she could to completely ignore them! Can she keep a straight face and continue her day-to-day life while surrounded by horrifying monsters?
The official music video for Muhyo & Roji's Bureau of Supernatural Investigation's ending theme, performed by ORESAMA.
As the sun sets around Seoul Station, an old man thought to have died sinks his teeth into the warm flesh of a homeless person. Soon, the streets are filled with vicious zombies desperate to feed. Hae-sun, a runaway, witnesses the frightening sight while her father Suk-gyu and boyfriend desperately search for her. As the attacked become the attackers, the government declares a lock out of the station, leaving the uninfected to struggle desperately against the dangerous undead. With zombie numbers exploding, people without a home to return to, now have to flee without a place to run to, in order to survive.