Unagisaki Hocho Knives This page first published: Jul 9, 2006 · Updated: Oct 5, 2019 · by CooksInfo. Copyright © 2021 · This web site may contain affiliate links · This web site generates income via ads · Information on this site is copyrighted. Taking whole pages for your website is theft and will be DCMA'd. See re-use information. A Unagisaki knife is a special Japanese knife for filleting eel. The blade’s nose is a straight 45 degree angle from top to bottom.