Ryu stows away on a space vessel, only to be found by the crew when it's far to late to return to earth. So they stick him in a spare sleep capsule instead. Things take a turn for the unexpected, however, when Ryu wakes up to find himself the sole survivor of the expedition, the spaceship having crash landed on a grossly mutated and wholly unfamiliar Earth. Joining forces with fellow survivors from a different crash, Ryu and his comrades fight to survive on this new and deadly Earth as they search for any humans that might've made it through the mysterious apocalypse.

The genius robotics professor, Dr. Komyoji has created Jiro (who has the ability to transform into Kikaider) – a humanoid robot tasked with the protection of Dr. Komyoji’s son, Masaru, and daughter, Mitsuko. Gifted with a conscience circuit, which has the power to simulate real emotions that helps to distinguish between “right and wrong”, Jiro must protect Mitsuko and Masaru from the evil Dr. Gil who wants Jiro to join his army and aid in his goal of world domination.

Cyborg 009 Conclusion - God's War is intended to be a proper conclusion to the original Cyborg 009 series. The manga is illustrated by Masato Hayase and based on Ishinomori's original concept notes, sketches, and a novel draft, all of which had been gathered by his son, Jo Onodera.

"Long ago there were nine cyborg warriors who came to save humanity whenever the world fell into crisis. These warriors wore red uniforms with yellow scarves and were known as the 00 Cyborgs. Through their efforts, peace was returned to the world, but thereafter their existence slowly faded from human memory. However, time has passed and the world has started to plunge into chaos once more."

Continuation of Kamen Rider Spirits after the series changed magazines, Shin Kamen Rider Spirits follows the war between the evil Badan Empire and the 10 Showa Kamen Riders and their allies.

After Japanese-American FBI agent Taki Kazuya and Kamen Rider 1 defeat a bat monster, they decide to contact the former riders including Stronger to investigate the appearance of monsters attacking them and civilians. Their investigation reveals the coming of an alien empire out to destroy the Earth, finishing the work that Shocker and other terrorist organizations have failed due to their defeat at the Rider's hands.

From TokyoPop (based on volume 1):

The World at the Brink of Self-Annihilation

The nuclear age has brought with it the arms race, which has led to the advent of weapons powerful enough to destroy the world itself several times over. Unwilling to take the plunge into Armageddon, the world powers, in league with a group known only as the Black Ghost, have developed super soldiers known as the Cyborgs, designed to fight the wars of the world in space. Unfortunately, the Black Ghost didn't ask the Cyborgs how they felt about their role in the new world order.

This classic work from manga legend Shotaro Ishinomori (Masked Rider) not only told a thrilling tale set against a backdrop of Cold War tensions, but it also helped define the genre of super team stories such as Battle of the Planets, Voltron, and The Power Rangers.