Joichi Onishima

 (鬼島 丈一, Onishima Jōichi) is the father of Homare Onishima.

Etymology

 * The name Joichi means "length, stature, measure" (丈) (jo) and "one" (一) (ichi).
 * Joichi's surname Onishima means "demon, ogre" (鬼) (oni) and "island" (島) (shima).