Planning to make a mod that accurately maps out Kiryu's scars, here's a rough map of everything that I can remember. I'd love to make multiple mods for K2/6/Gaiden/IW once I finish applying them to his 8 model, but for now it'll just be all of 'em applied to his final appearance. Most wound locations are based on my best guess, and are approximate due to variations between different engines/models, but I'm fairly confident on the torso wounds (with the exception of 0 and 5 because you don't see him shirtless without bandages in the former and the latter doesn't have a visible exit wound on the front), as well as any wounds on his back, because it's really easy to map using his tattoo even with model differences.
I got inspired after realizing Kaito actually has scars from his two big injuries <3