The 2020 Japan Curling Championships (Japanese: 2020年日本カーリング選手権大会), or the 37th Zen-Noh Japan Curling Championships (Japanese: 第37回全農日本カーリング選手権大会), the Japanese national men's and women's curling championships, were held from February 8 to 16 in 2020 at the in Karuizawa, Nagano.These championships were organized by the Japan Curling Association (JCA), and sponsored primarily by Zen-Noh.The women's winner was to represent Japan at the 2020 World Women's Curling Championship, but the event was cancelled due to the COVID-19 pandemic.