Gate: Jieitai Kanochi nite, Kaku Tatakaeri: Episode List

1- "Jieitai, Isekai e Iku" ("The Self-Defence Force Goes to Another World")
(自衛隊、異世界へ行く)

Airdate: July 4, 2015

A mysterious gate suddenly appears in Ginza, Tokyo, through which mythological creatures led by men in Roman armor emerge and attack the people. Yōji Itami, a JSDF reservist who is attending a nearby doujin convention, helps organize the police to evacuate the civilians to the Imperial Palace before the JSDF arrives to stop the invaders. For his actions, Itami is promoted to First Lieutenant and celebrated as a national hero. The appearance of the Gate and attack on Japanese civilians, dubbed the Ginza Incident, prompts the incumbent Prime Minister to take action by proclaiming that Japan will send a JSDF task force backed by the US to the "Special Region", the world beyond the Gate, to not only explore the new world but also capture and demand reparations from those responsible for the attack. After three months of preparation, the new Prime Minister sends off the JSDF task force, including itami, on their mission to the Special Region. Upon arriving, the task force encounters an army waiting for them, and prepares for battle.