as far as sugar-free coffee is concerned , upgraded products have been increasing with the improved level of convenient use of bottle cans with improved flavor . 無糖コーヒーはボトル缶使用による利便性の向上や味の向上によって改良された商品が増えてきている。
in yoshikawa-ku , joetsu city , which is the largest gohyakumangoku growing district in niigata prefecture , efforts to grow it with the nagata agricultural method have been made since the 1980s and sakamai with improved brewing aptitude (such as sugar content , hardness and structure ) have been produced . 新潟県内での五百万石の最大産地である上越市吉川区では1980年代から永田農法による栽培に取り組み、糖度・硬度・構造などの醸造適性を工夫した酒米を生産している。
