Doraemon Movie 37: Nobita no Nankyoku Kachikochi Daibouken

映画えいが ドラえもんどらえもん のび太のびたの南極なんきょくカチコチ大だい冒険ぼーけん

Nobita and his friends find a strange frozen ring, which guides them to Antarctica in search of its owner. There, they stumble upon some ancient ruins and begin an adventure, facing the danger that the Earth may become frozen.