Kazuma Ikezawa (池沢 佳主馬 Ikezawa Kazuma?) is the deuteragonist of Summer Wars, whose avatar is King Kazma, a renowned program/martial artist in OZ. He is a second cousin of Natsuki Shinohara. Kazuma is also a hikikomori who seldom leaves his room and uses his talents to win every game in OZ. But it's hinted that he does have friends, as more a spin-off manga made after Summer Wars telling about how he was able to become King Kazma.