Kishin Corps is a oVA anime that premiered in spring 1993, produced by Ginga Teikoku.

About the production: the story comes from a light novel, there are 7 episodes of about 33 minutes and its current status is "finished".

Its main genres are adventure, mecha and sci-fi, with themes such as Historical, Real Robot, Aliens and War.

On AniList, Kishin Corps has an average score of 63%, an average score, and appears on 1,120 users' lists.

October 1941, as the second World War threatens to destroy the civilized world, an unforeseen complication suddenly occurs. An alien invasion! Despite the sudden appearance of these extraterrestrial aggressors, the Axis and Allies continue their destructive conflict. Only the Kishin Corps and their giant Geo-Armor Robots (a.k.a.: Kishin), developed from a captured alien robot soldier, stand between the Earth and total annihilation! A teenager, named Taishi, suddenly finds himself at the center of a struggle over a mysterious black attaché case entrusted to him by his father, Professor Tokamura. The case contains the controlling mechanism for one of the giant Geo-Armor Robots, and the Japanese Kanto Army, the alien invaders, and the Kishin Corps all want to recover the device! Between the spies, the armies, the aliens, and the Giant Robots, Taishi is in for an epic adventure - if he can survive it! (Source: AnimeNfo)

Official synopsis from AniList.