Dai-Shogun - Great Revolution

Fūun Ishin Dai Shogun (風雲維新ダイ☆ショーグン) is a mecha anime television series, directed by Takashi Watanabe and animated by J.C.Staff and A.C.G.T. It began airing on April 9, 2014 on Tokyo MX. The mecha design is by Makoto Ishiwata of Nitroplus.

Plot
The series takes place in an alternate version of Japan where the Meiji Restoration never happened. Instead, the foreign ships were repelled by ancient giant robots called Onigami. Japan has since remained isolated from the rest of the world.

Official

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Other Sources

 * Anime News Network
 * Crunchyroll