Kakura is an evil youkai that was sealed by Shin'ichiro.
It's other body parts were strewn all over Taki's house. However the body is wearing a white kimono.
Shin'ichiro unconsciously sealed this youkai when he drew the kappa drawing and put it upside down at the storeroom.
However, Natsume tore off the drawing, unaware that by doing so would released Kakura from his seal.