Hanakatsuo This page first published: Jan 15, 2011 · Updated: Jun 20, 2018 · 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. Hanakatsuo are small, thin, almost transparent shavings of dried skipjack tuna. Cooking Tips Hanakatsuo flakes can be used as a subtle flavouring ingredient, or as a topping for dishes.