{"title":"Kokushibo Sword","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eKokushibo's Sword — The Blade of Upper Moon One\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eKokushibo is the most powerful demon under Muzan Kibutsuji and the strongest swordsman the Demon Slayer Corps has ever faced. Born as Michikatsu Tsugikuni during the Sengoku era, he was once a human Demon Slayer who abandoned his humanity in pursuit of eternal strength. As Upper Moon One, Kokushibo held his rank unchallenged for over four hundred years — a reign so dominant that no demon dared compete for his position. His katana is unlike any other weapon in Demon Slayer: a flesh-fused Nichirin blade covered in eyes that shift and pulse during combat, reflecting the grotesque fusion of demon biology and master swordsmanship.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAt Kanu Swords, our Kokushibo sword replica is hand-forged from high-carbon steel and crafted to capture the distinctive look of Upper Moon One's iconic blade. Full-tang construction, detailed guard work, and anime-accurate styling make this a standout piece for any Demon Slayer collection.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eMoon Breathing — The Forbidden Sixteenth Style\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eKokushibo is the creator and sole practitioner of Moon Breathing, a combat style he developed from his original training in Sun Breathing. Unable to fully master his brother Yoriichi's technique, Michikatsu adapted what he could learn into sixteen devastating forms that generate crescent-shaped slashes of compressed air. These moon blades multiply and change trajectory mid-flight, making them nearly impossible to predict or dodge. During his battle against the Hashira, Kokushibo's Moon Breathing overwhelmed multiple elite fighters simultaneously — cementing it as one of the most dangerous techniques in the series.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eThe Tsugikuni Tragedy\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eKokushibo's story is one of the most compelling villain arcs in anime. As Michikatsu Tsugikuni, he spent his entire life in his twin brother Yoriichi's shadow. Despite training relentlessly, he could never match Yoriichi's natural talent. When the Demon Slayer Mark appeared on both brothers — carrying the curse of an early death — Michikatsu made his choice. He accepted Muzan's blood and became a demon, trading his humanity for the immortality and power he believed he needed to surpass Yoriichi. Four centuries later, he was still chasing that goal. His final moments, crumbling to ash while remembering the brother he envied and loved, remain one of the most emotionally devastating scenes in Demon Slayer.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003ca href=\"\/collections\/yoriichi-sword\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\"\u003eBrowse the Yoriichi Tsugikuni Sword →\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eA Sword Like No Other\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhat makes Kokushibo's katana visually unique is its biological fusion. As a demon, his blade literally grew from his own flesh, covered in veins and multiple eyes that give it a living, organic appearance. It's the only weapon in Demon Slayer that blurs the line between sword and demon body — and it's one of the most visually striking weapon designs in all of anime. Our replica captures the distinctive blade profile and detailing that make this sword instantly recognizable to any fan of the series.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eDisplay It With Its Counterpart\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eKokushibo and Yoriichi's swords tell the same story from opposite sides. Displayed together, they represent the choice between humanity and power — the twin brothers who walked opposite paths. Many collectors pair them as a centerpiece for their Demon Slayer wall, alongside Hashira blades from Tanjiro, Rengoku, Sanemi, and the rest of the Corps.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003ca href=\"\/collections\/demon-slayer-sword\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\"\u003eBrowse all Demon Slayer Swords →\u003c\/a\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWho is Kokushibo?\u003c\/strong\u003e Kokushibo, born Michikatsu Tsugikuni, is Upper Moon One — the highest-ranking demon under Muzan Kibutsuji. He is Yoriichi Tsugikuni's twin brother and held his position unchallenged for over four hundred years.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat breathing style does Kokushibo use?\u003c\/strong\u003e Kokushibo created Moon Breathing, a sixteen-form combat style derived from Sun Breathing. It generates crescent-shaped air blades that multiply and change direction during flight.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eIs Kokushibo stronger than the Hashira?\u003c\/strong\u003e Yes. During the Infinity Castle arc, it took the combined efforts of Sanemi, Gyomei, Muichiro, and Genya to defeat Kokushibo — and even then, multiple fighters were critically wounded or killed in the battle.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat makes his sword look different?\u003c\/strong\u003e Kokushibo's katana is fused with his demon body, giving it an organic appearance with veins and eyes along the blade. It's the only biologically integrated weapon in the series.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eDo you carry both Kokushibo and Yoriichi swords?\u003c\/strong\u003e Yes. We carry replicas of both Tsugikuni brothers' blades. Many collectors display them together to represent the twin brothers' opposing paths. Browse our Yoriichi collection to see the matching piece.\u003c\/p\u003e","products":[{"product_id":"michikatsu-tsugikuni-katana","title":"Kokushibo Sword - Demon Slayer Upper Moon One Katana | Kanu","description":"\u003cp\u003e\u003cstrong\u003eThe Blade of Upper Moon One\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn the hierarchy of demons, none stood higher than Kokushibo—Upper Moon One, the strongest demon to serve under Muzan Kibutsuji for over four centuries. Before he became a monster, he was Michikatsu Tsugikuni, a demon slayer whose jealousy of his twin brother Yoriichi led him down the darkest path imaginable.\u003c\/p\u003e\n\u003cp\u003eThis is his sword. A sword as twisted and fearsome as the demon who channeled it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Tragedy of Michikatsu Tsugikuni\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMichikatsu wasn't born evil. He was a skilled swordsman, a member of the Demon Slayer Corps, and the twin brother of Yoriichi Tsugikuni—the greatest swordsman in history and creator of Sun Breathing.\u003c\/p\u003e\n\u003cp\u003eBut living in his brother's shadow consumed him. No matter how hard Michikatsu trained, he could never match Yoriichi's natural talent. That jealousy festered, and when Muzan offered him immortality and unlimited time to surpass his brother, Michikatsu accepted—becoming the demon Kokushibo.\u003c\/p\u003e\n\u003cp\u003eFor 480 years, he served as Upper Moon One, perfecting his Moon Breathing technique into something no human could ever master. His blade became an extension of his demonic power, featuring a distinctive flesh-like design with eyes embedded in the steel itself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMoon Breathing: The Demon's Art\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eKokushibo's Moon Breathing is derived from Sun Breathing but twisted into something darker. His sword style creates crescent-shaped slashes that can multiply in mid-air, overwhelming opponents with attacks from impossible angles.\u003c\/p\u003e\n\u003cp\u003eOnly the combined might of multiple Hashira could hope to challenge him—and even then, victory came at tremendous cost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSword Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOur Kokushibo katana captures the terror of Upper Moon One's legendary sword:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSword:\u003c\/strong\u003e Katana\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 1045 Steel\u003cbr\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e 102 Centimeters \/40 Inches\u003cbr\u003e\u003cstrong\u003eTang:\u003c\/strong\u003e Full Tang\u003cbr\u003e\u003cstrong\u003eSharpness:\u003c\/strong\u003e Hand-Sharpened\u003cbr\u003e\u003cstrong\u003eBohi:\u003c\/strong\u003e No\u003cbr\u003e\u003cstrong\u003eRayskin:\u003c\/strong\u003e Pink\u003cbr\u003e\u003cstrong\u003eIto and Sageo: \u003c\/strong\u003eGreen\u003cbr\u003e\u003cstrong\u003eSaya:\u003c\/strong\u003e hard wood, \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCraftsmanship Details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis replica honors the most powerful Upper Moon's terrifying presence:\u003c\/p\u003e\n\u003cp\u003e- Unique blade design reflecting Kokushibo's flesh-sword aesthetic\u003cbr\u003e- Dark color scheme matching the demon's corrupted Nichirin blade\u003cbr\u003e- Traditional katana construction with demonic details\u003cbr\u003e- Quality wrapped handle for authentic look and grip\u003cbr\u003e- Matching scabbard included\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- \"Demon Slayer collectors\" seeking Upper Moon representation\u003cbr\u003e- \"Cosplayers\" portraying Kokushibo at conventions\u003cbr\u003e- \"Fans\" of morally complex villains and tragic backstories\u003cbr\u003e- \"Collectors\" who appreciate unique, darker sword designs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- Kokushibo\/Michikatsu Tsugikuni katana replica\u003cbr\u003e- Matching scabbard\u003cbr\u003e- Microfiber cleaning cloth\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMost Swords Ship Fast From Texas\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe ship directly from our US warehouse—no waiting 4-8 weeks like overseas sellers. Your Upper Moon One blade arrives in just 3-5 business days.\u003c\/p\u003e\n\u003cp\u003e\"I just... wanted to be like my brother. I wanted to be like Yoriichi.\"* — Kokushibo's final words\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this Kokushibo's sword or Michikatsu's sword?\u003c\/strong\u003e\u003cbr\u003eThey're the same person! Michikatsu Tsugikuni was the human name of the demon who became Kokushibo. This replica represents his blade after becoming Upper Moon One, featuring the distinctive demonic aesthetic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes Kokushibo's sword different from other Demon Slayer swords?\u003c\/strong\u003e\u003cbr\u003eUnlike the colorful Nichirin blades of the Hashira, Kokushibo's blade has a dark, flesh-like quality with a more sinister appearance—reflecting his 480 years as a demon and his twisted Moon Breathing technique.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is Moon Breathing?\u003c\/strong\u003e\u003cbr\u003eMoon Breathing is a sword technique style derived from Sun Breathing, developed by Michikatsu before he became a demon. As Kokushibo, he perfected it into a devastating technique with 16 forms that create crescent-shaped attacks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Kokushibo stronger than the Hashira?\u003c\/strong\u003e\u003cbr\u003eYes—Kokushibo was the strongest Upper Moon and one of the most powerful beings in Demon Slayer. It took multiple Hashira fighting together to finally defeat him, and even then casualties were severe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this for cosplay?\u003c\/strong\u003e\u003cbr\u003eAbsolutely! This replica is perfect for Kokushibo or Michikatsu cosplay. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I display this sword?\u003c\/strong\u003e\u003cbr\u003eA horizontal wall mount or sword stand works beautifully for displaying this unique blade. The distinctive design makes it a conversation piece in any collection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow fast do you ship?\u003c\/strong\u003e\u003cbr\u003eWe ship from Texas, so US orders arrive in 3-5 business days—much faster than overseas competitors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e *Stand not included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/IMG_1092_480x480.jpg?v=1673713565\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/IMG_1093_480x480.jpg?v=1673713607\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/IMG_1094_480x480.jpg?v=1673713647\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/IMG_1095_480x480.jpg?v=1673713667\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/1661840565924_8_gsModify_480x480.jpg?v=1663119917\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/1661840565923_6_gsModify_480x480.jpg?v=1663119908\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/1661840565923_5_gsModify_480x480.jpg?v=1663119903\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Showhigh","offers":[{"title":"Default Title","offer_id":42743783358631,"sku":"SS529","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/9053\/6615\/files\/michikatsu-tsugikuni-katana-9519115.png?v=1768148417"}],"url":"https:\/\/www.kanuswords.com\/collections\/kokushibo-sword.oembed","provider":"Kanu Swords","version":"1.0","type":"link"}