Apr 3, 2020
April 3, 1971 - A Meteor Brings Aliens to Japan
On April 3, 1971, a meteor landed in Japan. This meteor came bearing an alien species, calling themselves Natives. The Natives immediately began working with humanity to develop an armored combat system later known as the Masked Rider System, fearing an attack from other members of their species, the Worms. This program was overseen by the company ZECT, which divided its forces into two groups: the ZECTroopers and the Zect Riders.
A second meteor would impact Japan in 1999, destroying the Shibuya area of Tokyo and finally bringing the dreaded evil Worms.
(Kamen Rider Kabuto, 2006-07) (source)