10half about 9 years ago Is うわん intended in this case as a ghostly howl of sorts?http://www.pixiv.net/tags.php?tag=%E3%81%86%E3%82%8F%E3%82%93
speck about 9 years ago It's a ghost/specter from the Edo period.http://wkp.fresheye.com/wikipedia/%E3%81%86%E3%82%8F%E3%82%93