Masayuki Hiraoka has a Character Design credit on Yuusha Exkaiser.
character design
TV anime / 1990
TV anime / 1992
Short TV anime / 1998
TV anime / 1998
Short TV anime / 2008
Short TV anime / 2011
TV anime / 2013
Short TV anime / 2012
TV anime / 2000
Movie / 2009