{"product_id":"damascus-yanagiba-270mm-105-layer-deep-ocean-wave","title":"Damascus Yanagiba 270mm — 105-Layer Deep Ocean Wave","description":"\u003cp\u003eThe yanagiba is Japan's sashimi knife. Its single bevel, long blade, and acute tip exist for one purpose: to pull through fish in a single stroke, preserving the integrity of the flesh and leaving a clean, glistening surface.\u003c\/p\u003e\u003cp\u003eThis blade is from the 洋流 (Yoryu — Ocean Current) series, hand-forged by 梵静刃物 (Bonsei Hamono). Three steel alloys — 440C, 440B, and the maker's own proprietary MKV10 — are folded and forge-welded together repeatedly until 105 distinct layers are achieved. The blade is then acid-etched to reveal the 深海波紋 (Shinkai Hamon — deep ocean wave) pattern within. Every blade is unique. No two carry the same mark.\u003c\/p\u003e\u003cp\u003eThe heat treatment process is where this knife separates itself. After forging, the blade is vacuum heat-treated to HRC63. It is then sub-zero processed — a cryogenic treatment that converts retained austenite in the steel to martensite, producing consistent hardness throughout the blade and improving long-term edge retention. Finally tempered to HRC61: calibrated for the balance between acute sharpness and toughness that a working kitchen knife demands.\u003c\/p\u003e\u003cp\u003eThe octagonal handle is hand-fitted ebony and black buffalo horn. The geometry sits naturally for the long pull strokes that yanagiba work requires.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eStainless base alloys — rust resistant. New, unused. Only 1 available.\u003c\/em\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e洋流 Yoryu — Ocean Current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaker\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e梵静刃物 (Bonsei Hamono)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlade length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e270mm (9-sun)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e425mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlade width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e37mm (heel) ~ 33mm (tip)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.3mm (heel) ~ 2.6mm (tip)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e245g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSteel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e105-layer Damascus — 440C + 440B + MKV10 (proprietary)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHRC61 (heat-treated to HRC63, tempered to HRC61)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeat treatment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVacuum hardening + sub-zero (cryogenic) processing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlade pattern\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e深海波紋 Shinkai Hamon (deep ocean wave), acid-etched\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBevel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle bevel (right-hand), hand-finished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHandle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEbony \u0026amp; black buffalo horn, octagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew, unused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n","brand":"Bonsei Hamono","offers":[{"title":"Default Title","offer_id":53676420235628,"sku":null,"price":420.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/5556\/9260\/files\/IMG_5664.jpg?v=1777440298","url":"https:\/\/oniblade.com.au\/products\/damascus-yanagiba-270mm-105-layer-deep-ocean-wave","provider":"鬼斬\/\/\/Oni-Giri Blade","version":"1.0","type":"link"}