kasha (youkai)
Kasha are a type of youkai that appear amidst stormy weather to bear the bodies of sinners to Hell. They are said to be cats that have turned into youkai (e.g. through long life). Sometimes temples near places where kasha are said to live will hold two funerals for the dead: in the first, the coffin is filled with rocks so that the kasha won't disrupt the funeral to carry off the deceased.
Taken from Touhou Wiki:http://en.touhouwiki.net/wiki/Rin_Kaenbyou