What happened with Iwao Kuroiwa and Yukinori Shinohara after the battle against Yoshimura?
I'm not sure about anime, but in manga, Iwao Kuroiwa


   lost his left arm, which was replaced by prosthesis.


and Yukinori Shinohara


   suffered brain damage due to heavy blood loss, and ended up in vegetable state.


In short, both characters are alive, but battle with Owl led to consequences of varying severity.