There's a dog in "Mold" that is seen barking outside the house. Since everything gets turned into mold, technically it's implied the dog did as well but it isn't shown or heard.
“Whispering Woman” contains inter-partner violence.
“The Bully” contains a mother physically abusing a child
“Layers of terror” contains parental violence toward a child
“The strange hikizuri siblings” contains sibling violence
In reference to "Long Hair in the Attic", the character dies from a heart attack and is found dead. Just before he dies, another character mentions that he is sick from heart problems. It is not a seizure.
Soichi, the kid with the nails in his teeth, frequently has scenes where his teeth are mishap and seem to be missing. In "Layers of Terror", it is shown that Reimi's sister has multiple rows of (intact) teeth.
Several episodes, including "Hanging Balloon", "The Strange Hikizuri Siblings" (they were dead before the episode though, but it's the main focus), and "The Story of the Mysterious Tunnel."
Yes. In Tomb Town, a car hits a person who subsequently dies. In Layers of Fear, a car nearly hits a semi-truck and then crashes into the woods. Graphic injuries are depicted in Layers of Fear.