Kyodai Originals
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    Kyodai OriginalsKyodai Originals
    Cor Slok · Owner

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    Authentic Japanese Antiques

    Discover RealUnique Pieces

    Museum-grade Japanese swords and armor. Hand-picked, NBTHK certified, delivered with lifetime authentication.

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    NBTHK Jūyō Tōken Tantō by Heianjō Nagayoshi with gold scabbard displayed against certification
    NBTHK Jūyō Tōken
    Muromachi 1469

    NBTHK Jūyō Tōken Tantō by Heianjō Nagayoshi

    NBTHK Jūyō Tōken Tantō by Heianjō Nagayoshi

    € 30.500,00Investment Grade Piece
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    Certified Authenticity
    NTHK · NBSK · NBTHK
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    Available Pieces

    Explore the rarest items

    27 pieces currently available. Each acquisition includes a private Amsterdam viewing, hard-paper certification, and lifetime authentication.

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    Why Kyodai

    Trust built on three pillars

    Curation

    Hand selected pieces

    Each object is sourced directly from Japanese auctions, dealers, and private collections by curators with over two decades of experience.

    Authentication

    NBTHK papers, lifetime guarantee

    Every piece is independently verified. We stand behind authenticity for life, with full documentation and provenance.

    Delivery

    Insured, discreet, worldwide

    Museum grade packing, full insurance, customs handled. Private Amsterdam viewing available on request.

    EXCLUSIVE MASTERPIECE

    Featured Highlight

    Nidai Muramasa Sayagaki katana with dark scabbard resting on a stand, paper certificates behind it
    Muramasa

    Nidai Muramasa Sayagaki

    € 48.500,00Discover
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    CONTACT US

    Speak with us directly

    Reach out by WhatsApp, email or phone. We answer personally, usually within a few hours.

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    +31 6 39 58 18 67
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    cslok@ziggo.nl
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    C.W. Slok, Kyodai Originals · KvK 51964147

    HISTORY AND TRADITIONS

    Explore our blogs

    All Posts
    Connoisseurship
    April 30 · 202611 min read

    Nidai Muramasa. A Katana with a Tanobe Sensei Sayagaki

    A second generation Muramasa katana (1532 to 1555) carrying an NBTHK Hozon paper, Tokubetsu Kichō certification, and a sayagaki by Tanobe Michihiro.

    KM
    Kenji Mori
    Connoisseurship
    April 8 · 20269 min read

    Jūyō Tōken. A Mumei Katana Attributed to Yamato Shizu

    What 'Jūyō Tōken' really means, why mumei attributions can be priceless, and a closer look at a Yamato Shizu katana in the Shizu Kaneuji tradition.

    HT
    Hiroshi Tanaka
    History
    March 18 · 202610 min read

    Yokoyama Sukekane 1866. The Last Light of the Samurai

    A Tokubetsu Hozon tachi by Bizen Osafune Yokoyama Sukekane, forged in 1866. The final years of the samurai class and the Bizen tradition itself.

    MdV
    Marleen de Vries

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