This is a Nenox series petty knife from the Ko no Hi line, with a blade length of 130mm. This model has been discontinued, and there are no current models with a 130mm blade, making this a valuable item. The current petty knives, even the more affordable 100mm models, are very expensive, costing 48,400 yen (including tax). I purchased this on Mercari and used it for about six months, so it shows signs of use. I think it can be cleaned up by sharpening the knife. Please consider this item with the understanding that it is a used product.