According to Article one of the Special Case of the National Uniform System, the color of Joi for the national uniform on occasions of not being worn as the formal clothes was not specified, and the colors of Joi and overcoat of the national uniform on the occasion of being worn as formal clothes may be any of dark brown, black, navy blue, or white.
国民服制式特例の第1条により、礼装しない場合の国民服の上衣の色の指定はなくなり、礼装する場合の国民服の上衣と外套の色は、茶褐色、黒色、濃紺色、または白色のいずれかでよいとされた。