With gently puffed five-minute sleeves. this Cuppe Shirt has the soft. rounded charm of a freshly baked bread roll. The proportions strike just the right balance in width and length. making it a thoughtfully tailored shirt for women.

Woven from a mix of flax-colored linen and deep indigo. the fabric has a lightness that suits the feeling of a sea breeze. The linen used is of high quality and now considered a rare material. Through the weaving process. it gains both structure and volume. with a textured surface that feels cool and dry—perfect for summer.

The deep. luminous blue of Ruri—a gemstone known in Japanese as lapis lazuli—shines through this fabric. When caught by the light. the indigo reveals even more vibrancy. As you wear and wash it over time. the fabric softens and matures. developing a lived-in ease. This piece reflects the quiet elegance of Japanese craftsmanship. brought to life through 45R’s careful design.