Any knife that's ground on a wheel rather than a flat sharpening stone has potential overgrinds. That is practically every Japanese knife. It's easy to see when you're thinning the knife on a whetstone. The most overground knife I ever owned was a Yoshikane hammer-patterened SKD gyuto. It was bad enough that I thought it should never have been sold. And it's only ever an issue if the overgrind is severe where the plane of the grind approaches the center midline of the blade.. Both my Carter HG gyutos have subtle overgrinds. No big deal when it's very stuble. The overgrind on that nakiri photo is just so severe, you wonder whether the sharpener was drunk. I've owned quite a few Moritakas over the years (SIX in all) and none of them were overground. However, they were all damascus customs, and likely they were ground with more care by an expert and not some novice.