Talk:Arata Kirishima/@comment-66.183.14.209-20170408082517/@comment-10733658-20170415000936

^ We know there is a genetic element, in terms of capacity and potential.

The Tsukiyama Family, for example, has a defect that prevents the mutation from occurring. Based on this information and seeing Kakujas in particular families and OEGs, it's likely there is a reverse of this with a genetic trait that makes the mutation more likely.