He was learning on how to punch to beat the larger students of his gym class? Off a book? Kazuya might have laughed, but Tomako would've probably given him an odd look at that. Instead, he settled for a disapproving glance.
"There's no use in trying to learn how to fight off a book. A book can guide you through it mechanically.. But there's no personality or essence to it. No style or assistance. Learning to fight is something no book can teach you fully. I'm guessing you want to learn just how to wrestle?"
While Kazuya didn't personally approve of such.. regulation techniques, he could at least pass on a few tips that Shirai had given him.