Gasaraki - Season 1 Episode 10 Kugai

Sensing the proximity of Miharu and the other Symbol Ishtar (known colloquially as Fakes), Yushiro instinctively begins to perform the Gasara Dance. Before long, the stomach of the abandoned robot, known as the Kugai, opens up and takes in Yushiro as a pilot. The robot, adorned like an ancient Japanese samurai, battles and defeats the intruding weapons platforms and captures Miharu. When Yushiro leaves the Kugai, his master, Sorochi, informs him that Yushiro is a kai, a man with the special talent required to control the Kugai, and that the Kugai itself is a gift from Gasaraki. Sorochi says Yushiro must travel to Kyoto with Miharu in order to find out more.