{"product_id":"boncoura-43-wwii-natural-indigo-dyed-type-1-denim-jacket-15th-anniversary-model","title":"Boncoura 43 WWII Natural Indigo Dyed Type 1 Denim Jacket - 15th Anniversary Model","description":"\u003cdiv class=\"custom-tabs\"\u003e\n\u003cul class=\"custom-tab-nav\"\u003e\n\u003cli data-tab=\"intro\" class=\"active\"\u003eIntro\u003c\/li\u003e\n\u003cli data-tab=\"details\"\u003eDetails\u003c\/li\u003e\n\u003cli data-tab=\"size\"\u003eSize Chart\u003c\/li\u003e\n\u003cli data-tab=\"measure\"\u003eHow We Measure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"custom-tab-content active\" id=\"intro\"\u003e\n\u003cp style=\"margin-left: 10px; margin-top: 20px; text-align: left;\"\u003e- The Boncoura 43  WWII Type 1 Jacket is a special model created to celebrate the brand’s 15th anniversary, combining the atmosphere of wartime denim with natural indigo dyeing. While traditional natural indigo dyeing often uses the “kase-zome” method, this special model instead uses a natural indigo rope-dyeing technique in order to keep the core of the yarn white. This allows the denim to develop stronger fades, whiskers, and vertical contrast compared to traditional kase-dyed natural indigo denim, while still keeping the deep color and texture unique to genuine natural indigo.\n\u003cbr\u003e\u003cbr\u003e\nThe fabric is built around Boncoura’s signature “Ikemen Denim,” developed from the yarn stage with careful attention paid to cotton selection, blending, and spinning methods. The warp yarn is dyed using genuine natural indigo made from sukumo, a traditional fermented indigo material. Preparing the sukumo alone requires around three to four months, during which craftsmen carefully monitor the temperature and humidity every single day. By combining traditional natural indigo techniques with modern rope-dyeing methods, Boncoura has created this special denim with a fading character that cannot normally be experienced with traditional kase-dyed natural indigo denim.\n\u003cbr\u003e\u003cbr\u003e\nFor the details, the jacket follows the classic WWII-era Type I design, featuring front pockets without flaps and a simplified four-button front construction inspired by wartime production specifications. Other details include newly designed iron buttons created specially for this model, along with a calligraphy-style “AI” kanji print inside the jacket to commemorate Boncoura’s 15th anniversary — a hidden detail carrying the spirit and meaning behind this special release.\u003cbr\u003e\u003cbr\u003e\nNotes:\n\u003cbr\u003e\u003cbr\u003e\n“Kase dyeing” is a traditional natural indigo dyeing method where the yarn is bundled into loose skeins and dyed deeply by hand many times. The indigo penetrates deep into the yarn core, creating a rich natural indigo color, but usually with softer fades and less contrast compared to rope-dyed denim. \n\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv id=\"details\" class=\"custom-tab-content\"\u003e\n\u003cdiv class=\"mobile-scroll-table-2\"\u003e    \n\u003ctable class=\"details-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eMaterial:\u003c\/td\u003e\n\u003ctd\u003e100% Cotton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eWeight:\u003c\/td\u003e\n\u003ctd\u003e15 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eWeaving Method:\u003c\/td\u003e\n\u003ctd\u003eTwill Weave on Old Shuttle Loom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eDyeing:\u003c\/td\u003e\n\u003ctd\u003eWarp - Rope-Dyed Natural Indigo \/ Weft - Natural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eFabric Finish:\u003c\/td\u003e\n\u003ctd\u003eUnsanforized, One-Washed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eSilhouette:\u003c\/td\u003e\n\u003ctd\u003eRegular Fit with a Roomy Chest\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eOrigin:\u003c\/td\u003e\n\u003ctd\u003eMade in Japan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"label\"\u003eDetails:\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- 15th Anniversary Special Model\u003c\/td\u003e\n\u003c\/tr\u003e \n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- Special Tanned Deerskin Leather Patch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- Custom Boncoura Iron Buttons\u003c\/td\u003e\n\u003c\/tr\u003e  \n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- Custom Copper Rivets\u003c\/td\u003e\n\u003c\/tr\u003e \n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- Anniversary 「AI」 Print Inside\u003c\/td\u003e\n\u003c\/tr\u003e \n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- Yellow WWII-Style Stitching\u003c\/td\u003e\n\u003c\/tr\u003e   \n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- All-Cotton Thread Construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- Custom Two-Prong Cinch Back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- T-Back Construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e- Selvedge Detail on Inner Front Facing\u003c\/td\u003e\n\u003c\/tr\u003e    \n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e  \n\n\u003c!-- Size Beginning --\u003e\n \n\u003cdiv id=\"size\" class=\"custom-tab-content\"\u003e\n\u003cdiv class=\"size-toggle\"\u003e\n  \u003cbutton class=\"toggle active\" onclick=\"convertSize('cm')\"\u003ecm\u003c\/button\u003e\n  \u003cbutton class=\"toggle\" onclick=\"convertSize('in')\"\u003einches\u003c\/button\u003e\n\u003c\/div\u003e\n\u003c!-- Size Chart cm --\u003e\n   \u003cdiv class=\"mobile-scroll-table\"\u003e\n \u003ctable class=\"size-chart\" id=\"size-chart\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003e36\u003c\/th\u003e  \n\u003cth\u003e38\u003c\/th\u003e\n\u003cth\u003e40\u003c\/th\u003e\n\u003cth\u003e42\u003c\/th\u003e\n\u003cth\u003e44\u003c\/th\u003e  \n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eShoulder\u003c\/td\u003e\n\u003ctd data-cm=\"47.5\"\u003e47.5\u003c\/td\u003e\n\u003ctd data-cm=\"49\"\u003e49\u003c\/td\u003e\n\u003ctd data-cm=\"50.5\"\u003e50.5\u003c\/td\u003e\n\u003ctd data-cm=\"52\"\u003e52\u003c\/td\u003e\n\u003ctd data-cm=\"53.5\"\u003e53.5\u003c\/td\u003e   \n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChest\u003c\/td\u003e\n\u003ctd data-cm=\"116\"\u003e116\u003c\/td\u003e\n\u003ctd data-cm=\"119\"\u003e119\u003c\/td\u003e\n\u003ctd data-cm=\"121\"\u003e121\u003c\/td\u003e\n\u003ctd data-cm=\"124\"\u003e124\u003c\/td\u003e\n\u003ctd data-cm=\"128\"\u003e128\u003c\/td\u003e   \n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaist\u003c\/td\u003e\n\u003ctd data-cm=\"57\"\u003e57\u003c\/td\u003e\n\u003ctd data-cm=\"58\"\u003e58\u003c\/td\u003e\n\u003ctd data-cm=\"60\"\u003e60\u003c\/td\u003e\n\u003ctd data-cm=\"61\"\u003e61\u003c\/td\u003e\n\u003ctd data-cm=\"63\"\u003e63\u003c\/td\u003e  \n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHem\u003c\/td\u003e\n\u003ctd data-cm=\"55.5\"\u003e55.5\u003c\/td\u003e\n\u003ctd data-cm=\"56.5\"\u003e56.5\u003c\/td\u003e\n\u003ctd data-cm=\"58\"\u003e58\u003c\/td\u003e\n\u003ctd data-cm=\"59\"\u003e59\u003c\/td\u003e\n\u003ctd data-cm=\"61\"\u003e61\u003c\/td\u003e  \n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSleeve Length\u003c\/td\u003e\n\u003ctd data-cm=\"60\"\u003e60\u003c\/td\u003e\n\u003ctd data-cm=\"62\"\u003e62\u003c\/td\u003e\n\u003ctd data-cm=\"63\"\u003e63\u003c\/td\u003e\n\u003ctd data-cm=\"64\"\u003e64\u003c\/td\u003e\n\u003ctd data-cm=\"65\"\u003e65\u003c\/td\u003e  \n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArm Hole\u003c\/td\u003e\n\u003ctd data-cm=\"28\"\u003e28\u003c\/td\u003e\n\u003ctd data-cm=\"29\"\u003e29\u003c\/td\u003e  \n\u003ctd data-cm=\"29.5\"\u003e29.5\u003c\/td\u003e\n\u003ctd data-cm=\"30.5\"\u003e30.5\u003c\/td\u003e  \n\u003ctd data-cm=\"31\"\u003e31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Length\u003c\/td\u003e\n\u003ctd data-cm=\"59\"\u003e59\u003c\/td\u003e\n\u003ctd data-cm=\"60\"\u003e60\u003c\/td\u003e\n\u003ctd data-cm=\"62\"\u003e62\u003c\/td\u003e\n\u003ctd data-cm=\"64\"\u003e64\u003c\/td\u003e\n\u003ctd data-cm=\"66\"\u003e66\u003c\/td\u003e  \n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"size-note\"\u003e• Measurements are based on one-washed jacket.\n  \u003cbr\u003e• Slight variations may occur due to manual measurement and washing.\n \u003c\/p\u003e   \n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- End Size Chart Inch --\u003e\n\n\u003c!-- How we measure --\u003e\n\u003cdiv id=\"measure\" class=\"custom-tab-content\"\u003e\n  \u003cdiv class=\"measure-toggle\"\u003e\n    \u003cbutton data-type=\"tops\" class=\"measure-btn active\"\u003eTops\u003c\/button\u003e\n    \u003cbutton data-type=\"bottoms\" class=\"measure-btn\"\u003eBottoms\u003c\/button\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- NEW: scrollable wrapper --\u003e\n  \u003cdiv class=\"measure-scroll\"\u003e\n    \u003cdiv class=\"measure-content tops\"\u003e\n      \u003ch4\u003eShoulder Width\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Shoulder.jpg?v=1747667689\" alt=\"Shoulder Width\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure straight across from shoulder seam to shoulder seam on the back.\u003c\/p\u003e\n\n      \u003ch4\u003eChest Width\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Chest_New.jpg?v=1747667689\" alt=\"Chest Width\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure straight across the front of the garment, from armpit to armpit.For size chart reference, chest measurement is shown as full circumference ( flat measurement x 2 ).\u003c\/p\u003e\n  \n      \u003ch4\u003eWaist Width\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Waist.jpg?v=1747667689\" alt=\"Waist Width\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure across the narrowest part of the shirt — from seam to seam — between the chest and the hem.\u003c\/p\u003e\n  \n      \u003ch4\u003eHem Width\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Hem.jpg?v=1747667689\" alt=\"Hem Width\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure straight across the bottom edge of the shirt, from one side seam to the other — just above the curved hem.\u003c\/p\u003e\n  \n      \u003ch4\u003eSleeve Length (Set-In)\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Sleeve.jpg?v=1747667689\" alt=\"Sleeve Length (Set-In)\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure from the top of the shoulder seam straight to the end of the cuff.\u003c\/p\u003e\n  \n      \u003ch4\u003eSleeve Length (Raglan)\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Raglan.jpg?v=1747667689\" alt=\"Sleeve Length (Raglan)\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure from seam of collar all the way down to the end of the cuff.\u003c\/p\u003e\n\n      \u003ch4\u003eArmhole\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Arm.jpg?v=1747667689\" alt=\"Armhole\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure vertically from the shoulder seam down to the bottom of the armhole seam.\u003c\/p\u003e\n\n      \u003ch4\u003eBody Length\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Shirt_Length.jpg?v=1747667689\" alt=\"Body Length\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure from the center of the base of the collar (just below the collar band) straight down to the bottom hem.\u003c\/p\u003e \n    \u003c\/div\u003e\n\n    \u003cdiv class=\"measure-content bottoms\" style=\"display: none;\"\u003e\n      \u003ch4\u003eWaist\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Waist.jpg?v=1747667719\" alt=\"Waist\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure straight across the top of the waistband from edge to edge, then double the measurement.\u003c\/p\u003e \n\n      \u003ch4\u003eFront Rise\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Front_Rise.jpg?v=1747667719\" alt=\"Front Rise\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure the front rise from the crotch seam straight up to the top of the front waistband.\u003c\/p\u003e \n\n      \u003ch4\u003eBack Rise\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Back_Rise.jpg?v=1747667719\" alt=\"Back Rise\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure from the crotch seam to the top of the back waistband.\u003c\/p\u003e \n\n      \u003ch4\u003eHip Width\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Hip.jpg?v=1747667719\" alt=\"Hip Width\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure 7.5 cm (or 3 inches) up from the crotch seam, then go straight across from side to side while laid flat, then double the measurement.\u003c\/p\u003e \n\n      \u003ch4\u003eThigh Width\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Thigh.jpg?v=1747667719\" alt=\"Thigh Width\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure horizontally from the crotch seam straight out to the outer edge of the thigh.\u003c\/p\u003e \n\n      \u003ch4\u003eKnee\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Knee_1.jpg?v=1747667719\" alt=\"Knee\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure 33 cm (or 13 inches) down from the crotch seam along the inside leg seam.\u003c\/p\u003e \n\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Knee_2.jpg?v=1747667719\" alt=\"Knee\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure straight across the leg from one side to the other.\u003c\/p\u003e \n\n      \u003ch4\u003eInseam\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Inseam.jpg?v=1747667719\" alt=\"Inseam\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure from the crotch stitch all the way to the end of the leg.\u003c\/p\u003e \n\n      \u003ch4\u003eLeg Opening\u003c\/h4\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5356\/2659\/files\/Jeans_Leg.jpg?v=1747667719\" alt=\"Leg Opening\"\u003e\n      \u003cp style=\"margin-left: 10px; margin-top: 10px; text-align: left;\"\u003e- Measure straight across the bottom cuff — from one side of the leg opening to the other.\u003c\/p\u003e \n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- End How we measure --\u003e\n\n\u003cscript\u003e\n(function() {\n  var customTabs = document.querySelector('.custom-tabs');\n  if (!customTabs) return;\n\n  function refreshOpenDescriptionHeight(el) {\n    var wrapper = el.closest('.collapsible-content');\n    if (!wrapper) return;\n\n    var inner = wrapper.querySelector('.collapsible-content__inner');\n    if (!inner) return;\n\n    wrapper.style.height = inner.scrollHeight + 'px';\n\n    setTimeout(function() {\n      wrapper.style.height = inner.scrollHeight + 'px';\n    }, 50);\n\n    setTimeout(function() {\n      if (wrapper.classList.contains('is-open')) {\n        wrapper.style.height = 'auto';\n      }\n    }, 500);\n  }\n\n  function getActiveTabContent() {\n    return customTabs.querySelector('.custom-tab-content.active');\n  }\n\n  function getSizeWrap() {\n    return customTabs.querySelector('#size');\n  }\n\n  function convertSizeLocal(unit) {\n    var sizeWrap = getSizeWrap();\n    if (!sizeWrap) return;\n\n    var buttons = sizeWrap.querySelectorAll('.toggle');\n    buttons.forEach(function(btn) {\n      btn.classList.remove('active');\n    });\n\n    var activeButton = sizeWrap.querySelector('.toggle[onclick*=\"' + unit + '\"]');\n    if (activeButton) {\n      activeButton.classList.add('active');\n    }\n\n    var cells = sizeWrap.querySelectorAll('#size-chart td[data-cm]');\n    cells.forEach(function(cell) {\n      var cm = parseFloat(cell.getAttribute('data-cm'));\n      if (cm === 0 || isNaN(cm)) {\n        cell.textContent = '---';\n      } else {\n        cell.textContent = (unit === 'in') ? 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