Masunaga® KOUKI 103 Eyeglasses by Masunaga®. Color: 30 Clear, 23 BR, 19 BK, Size: 45-20-145. Silhouette reminiscent of the mid-century era. MASUNAGA. By using unique cutting, nostalgic brown and black, and trendy clear, we have created a vintage style yet modern mood. The sparkling metal texture, including the temple core pattern that is visible through the acetate fabric and the jutting decoration that appears when the frame is closed, further elevating the overall frame's grade.