Sen-Ichi Saku – brand of transcendent masterpiece spectacle frames, handcrafted by the spectacle artisan Sen-Ichi in Sabae, Japan, which is widely recognised for the production of eyewear.

Each piece is strictly made by hand with proficient skills, and the quantity is very limited. The frames are made from natural material Celluloid and the leading metal material Beta-Titanium. The sleek and distinguished shine of Celluloid together with the durability and flexibility of Beta-Titanium makes a complete set of a high-quality frame.