Roji Associates, founded in 2000 by artist Hisao Iwashimizu and his brother in Oshu City, Iwate Prefecture, creates Nambu ironware that blends tradition with modern aesthetics. Known for its gently curved shapes, vibrant Japanese pigments like cherry blossom pink and "shikon," and playful motifs such as butterflies and chrysanthemums, the brand reimagines traditional designs. Inspired by tea master Sen no Rikyu's philosophy of simplicity, Roji's works maintain the robustness of Nambu ironware while incorporating innovation. Recognized globally, their pieces were featured in MOMA's museum shop, highlighting their contemporary appeal and craftsmanship leadership.