He is twin brother of illustrator Tomer Hanuka. During his mandatory army service he began collaborating with Israeli writer Etgar Keret. In 1997 a collection of Etgar"s stories illustrated by Asaf was publish under the title "Streets of Rage".
He collaborated with French writer Didier Daeninckx on "Carton Jaune!" in 2004 Published in France.
Tomer and Asaf have created together “The Dirties”, a short narrative available on line. They currently collaborate on a graphic fiction called "The Divine", written by Boaz Lavie, to be released in 2015 in both English and French.
Asaf has also contributed art for the Oscar nominated animation documentary film Waltz with Bashir. His autobiographical comics The Realist started on January 2010, published in Calcalist (Israeli business magazine).
2 collections of the realist pages were published in book form in France on 2012 and 2014 and have been translated to 6 languages.
He has been practicing commercial illustration since 1995. Among his clients: Nike, Canal+, Rolling Stone, Fortune, New York Times, Time, Wall Saint Journal, Forbes, Personal Computer magazine, Newsweek, Men's Health and more.