The left pocket is pierced for a pen, the back yoke is a hanger loop, and the buttons are dyed with natural colored nut buttons so that the buttons are dyed, and all are sewn before dyeing. We increased the size development from the previous model to 4 sizes, and adjusted the width of each size accordingly. The fabric has been changed to a 2x2 twill weave that is moderately soft and also durable. A machine shop that has been in Japan since the Meiji era, it specializes in white coats, and currently it continues to weave only two types of fabrics and plain weaves by itself.