Founded in London by Gow Tanaka in 2020, 3RD/DIADEM is where tradition meets innovation. With over 25 years of experience in fashion and a deep appreciation for Japanese craftsmanship, Gow set out to create timeless, sustainable design.

Our pieces are built from Richlite, a premium material made from recycled paper fibers, offering strength, beauty, and sustainability. Handmade in East London, each item—whether unisex accessories or tableware—is a blend of function, artistry, and eco-consciousness.

Rooted in the Japanese philosophies of KARESANNSUI (japanese dry-garden express of flow of water), 3RD/DIADEM creates designs that value simplicity, balance, and enduring beauty. We believe in creating less, but creating better—objects that last, tell a story, and stand the test of time.