 To provide realistic bodies while preventing the corpses from moving , after a lengthy casting process the crew chose extras who could lie as still as possible . For the bath house owner <unk> Yamashita , this was not possible owing to the need to see her alive first , and a search for a body double was unfruitful . Ultimately , the crew used digital effects to transplant a still image of the actor during the character 's funeral scene , allowing for a realistic effect . 
