Japan's longest river, the Shinano, flows north through the middle of Nagaoka, dividing it into the East Riverside and West Riverside areas. Centering around this river, the city has a vast variation in its climate between the seasons, and is blessed with beautiful and rich natural surroundings. Nagaoka's summers are hot and humid, while the winters are snowy, influenced by the monsoon.
日本で一番長い信濃川が北から中央を流れ、長岡市を川東地域と川西地域とに分けています。信濃川を軸として形成されてきた長岡市は、季節の移り変わりが鮮やかで、美しく豊かな自然風土に恵まれています。その気候は高温多湿である一方、冬は季節風が強く降雪があります。