{"product_id":"ryoba-noko-japanese-both-sided-hand-saw-hand-saw-by-yamakuchi-sukezaemon-210mm","title":"Ryoba Noko Japanese Both Sided Hand Saw Hand Saw By Yamakuchi Sukezaemon - 210mm","description":"\u003cp\u003eSmith name: \u003cem\u003e\u003cstrong\u003eYamakuchi Sukezaemon (山口介左衛門, 1911~1975)\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eSteel:\u003cb\u003e\u003ci\u003e Carbon Steel\u003c\/i\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eCutting edge length:\u003cem\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e210mm\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eTotal length:\u003cspan\u003e \u003cem\u003e\u003cstrong\u003e453\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003cem\u003e\u003cstrong\u003emm \u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eBlade thickness: \u003cem\u003e\u003cstrong\u003eabout 0.45mm\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eBlade width: \u003cstrong\u003e\u003cem\u003e73~90mm\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWeight:\u003cspan\u003e \u003cem\u003e\u003cstrong\u003e90\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003cem\u003e\u003cstrong\u003eg\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eBlade sharpening and adjusting: \u003cmeta charset=\"utf-8\"\u003e\u003cem\u003e\u003cstrong\u003eYamakuchi Sukezaemon\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eManufacture Era:\u003cstrong\u003e\u003c\/strong\u003e\u003cem\u003e\u003cstrong\u003e\u003cspan\u003e Before 1970s\u003c\/span\u003e\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eAccessories：-\u003c\/p\u003e\n\u003cp\u003eAdditional Information:\u003cstrong\u003e\u003c\/strong\u003e\u003cem\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003eUnused and in good condition, though it shows some minor surface rust. It was sourced from the same professional tool shop in the Kanto region as the \u003c\/strong\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(0, 170, 255);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(0, 170, 255);\" href=\"https:\/\/tenmoku0701.myshopify.com\/products\/douzuki-noko-japanese-precision-cross-cutting-hand-saw-by-yamakuchi-sukezaimon-240mm\" target=\"_blank\"\u003eYamaguchi Sukezaemon Douzuki\u003c\/a\u003e\u003c\/span\u003e I previously listed. I acquired this recently, and it is the last saw by Yamaguchi Sukezaemon that the shop had in stock.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eThis saw has been well-preserved. Crucially, it has never undergone Metate (sharpening\/tuning) by any other craftsman. It perfectly retains the original edge and finish directly from Blacksmith Yamaguchi.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eI consulted Mr. Tsuchida regarding this saw, and he shared some key insights that are not mentioned in any publicly available online records. I would like to share those exclusive details with you here.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eTechnical Lineage\u003cbr\u003eYamaguchi's technique was most heavily influenced by \u003cmeta charset=\"utf-8\"\u003eOba Shoichiro  I (First Generation), despite the fact that \u003cmeta charset=\"utf-8\"\u003eOba never officially accepted him as an apprentice.\u003c\/strong\u003e\u003c\/em\u003e\u003cem\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eSteel\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cem\u003e\u003cstrong\u003eUnlike other blacksmiths who strictly adhere to specific grades like White Paper (Shirogami) No. 1 or No. 2, Yamaguchi did not limit himself to a fixed steel type. Instead, he would visit material suppliers regularly to personally select and test the steel before purchasing.\u003c\/strong\u003e\u003c\/em\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eWhile the specific batches varied, it is certain that he exclusively used carbon steel, never alloy steels like Blue steel (Aogami).\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cem\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/em\u003e\u003cem\u003e\u003cstrong\u003eAccording to Mr. Tsuchida, the master hammer smith Kozaburo often encountered Yamaguchi at steel shops in Sanjo, testifying to his rigorous selection process.\u003c\/strong\u003e\u003c\/em\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eThe Secret of \"Nagagire\" (Edge Retention)\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eAccording to Mr. Tsuchida, Yamaguchi aimed for a higher degree of hardness during the heat treatment process. \u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eNaturally, despite this extreme hardness, the steel retains excellent toughness (tenacity) to prevent the blade from snapping—a balance similar to that of Kiyotada chisels, which are also renowned for their exceptional edge retention.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eHowever, this hardness made the manual scraping process using the \"Sen\" tool incredibly labor-intensive. The hard steel created significant cutting resistance and caused the tool to slip easily, requiring immense skill and time to finish.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFurthermore, the tooth profile is designed to be more robust than the overly slender teeth commonly found on the market. This specific cross-cut tooth geometry was also favored and recommended by the master smith Miyano Tetsunosuke.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"TENMOKU","offers":[{"title":"Default Title","offer_id":47855809167598,"sku":null,"price":95000.0,"currency_code":"JPY","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/0162\/5326\/files\/DSF6561.jpg?v=1775434717","url":"https:\/\/tenmoku0701.myshopify.com\/products\/ryoba-noko-japanese-both-sided-hand-saw-hand-saw-by-yamakuchi-sukezaemon-210mm","provider":"TENMOKU","version":"1.0","type":"link"}