This is a usuba knife by the master craftsman, Masakuni Genkai (Yukio Mukai). It is a knife from the Fudou Kuniyuki series, part of the top-of-the-line Japanese knife series sold by Minamoto Trading in the past. It is an eight-sun (approximately 24 cm) blade, the largest size among the usuba knives released at the time. This is a top-rank Japanese knife, specializing in sharpness, using water-quenched hon-yaki steel made from Yasugi Steel Shirogami No. 2, favored by professional chefs. Blade length: Approximately 243mm (from tip to machi) Approximately 227mm (from tip to heel) Blade width: Approximately 53mm (around the base of the blade) Blade thickness: Approximately 5mm (at the spine near the base) Total length: Approximately 385mm Weight: Approximately 350g Handle: Marble black buffalo horn and ebony octagonal handle Saya (Sheath): Ho wood Pin: Ebony I hope it will be cherished by someone who appreciates it.