Shingu

Shingu: Secret of the Stellar Wars (学園戦記ムリョウ Gakuen Senki Muryō, lit. "Record of School Wars Muryou") is an anime series directed by Tatsuo Sato and mainly animated by Madhouse. Shingu aired from May 8, 2001 through December 4, 2001 on NHK. It ran for 26 episodes.

Plot
In the year 2070, an alien invasion of Tokyo is repelled by a mysterious giant being which is almost a monster in itself.