This is a very rare kitchen knife made by Yoshisada Okishiba. It is a very old knife from the time when Yoshisada was making Aritsugu knives, a long-established cutlery shop in Kyoto. The typeface of the stamp is very similar to the brand's typeface at that time. It is a large, eight-sun knife that is heavy and has a lot of power, so it would be difficult to use unless you are a professional who is used to handling knives. Blade length: Approximately 243mm (from tip to machi) Approximately 228mm (from tip to heel) Blade width: Approximately 54mm (around the base of the blade) Blade thickness: Approximately 5.4mm (at the back of the blade near the base) Total length: Approximately 392mm Weight: Approximately 363g Handle: Black buffalo horn chestnut-shaped ho wood handle I hope that someone who will cherish it will take good care of it. Okishiba Noboru Okishiba Aritsugu Usuba knife