Gate: Jieitai Kano Chi nite, Kaku Tatakaeri is a Japanese fantasy novel series written by Takumi Yanai and illustrated by Daisuke Izuka and Kurojishi from 2006. A manga adaptation illustrated by Satoru Sao began in July 2011, and three spin-off manga began in 2015. The first half of an anime television series adaptation aired from July to September 2015, and the second half aired from January to March 2016. The series has been licensed by Sentai Filmworks in North America. A sequel novel series, Gate: Weigh Anchor, began publication in 2017.