Custom 230x51 KU based off this one. All I said was 225-230 and at least 50 mm, otherwise do what Kusunoki san thinks best. Michael threw an ebony handle on there he had floating around the shop. Balance point right at the pinch so it feels super agile, though I'm thinking of switching the handle to make balance a little more forward as my tastes have leaned in that direction. It's quite a flat profile, feels like a big nakiri with a laser of a tip, which I quite enjoy.Which Model do you specifically have?
https://knifejapan.com/unshu-yukimitsu-hamono-kurouchi-gyuto-200mm/