If you're looking for manga similar to Lensman (Moribi MURANO), you might like these titles.
The story begins when the young mathematician Gaal Dornick arrives on Trantor, the capitol planet of a 12,000-year-old galactic empire, at the invitation of Hari Seldon. Hari Seldon is a mathematician who developed the science of psychohistory, which combines history, sociology, and statistics in order to make predictions about the future of large groups of people. To Gaal's surprise, he and Hari Seldon are arrested for treason shortly after his arrival! Hari Seldon has made a prediction that the Empire will fall in 500 years, after which there will be a 30,000 year dark age. He claims that nothing can be done about the fall, but that he can use his knowledge of psychohistory to shorten the following dark age to 1,000 years. The Empire's rulers are not thrilled with this news, and they exile Hari, Gaal and others who are involved to the remote planet of Terminus. Thus begins the Foundation, which must endure through the end of the Empire, and follow Seldon's plan to bring humanity through on the best possible path!
Winston Smith works for the Ministry of Truth in London, chief city of Airstrip One. Big Brother stares out from every poster, the Thought Police uncover every act of betrayal. When Winston finds love with Julia, he discovers that life does not have to be dull and deadening, and awakens to new possibilities. Despite the police helicopters that hover and circle overhead, Winston and Julia begin to question the Party; they are drawn towards conspiracy. Yet Big Brother will not tolerate dissent - even in the mind. For those with original thoughts they invented Room 101...
Yorozu Genkurou, wandering warrior, possesses an huge sword which makes him redoubtable to his enemies. While he crosses a dark forest, he suddenly sees the fall of what looks very much like a spaceship. Since, he is constantly being attacked by strange ninjas and ambitous fighters. Indeed, he will soon realize that his assailants are nothing else than aliens landed on Earth to find 3 artifacts made of Orichalcum, an alien substance with powerful mystical virtues. And one of the artifacts is the sword he wears. The hunt begins.
The manga takes place in a world where terrorism and ethnic conflicts are intensifying, organized crime is becoming more violent, and manned military weaponry is spreading around the world. Junichirō Okitsu is a former foreign affairs bureaucrat who establishes a special department within the Tokyo police. He employs two mercenaries, and so is seen by other police as a traitor. His department fights against atrocious criminals.
The war on terror exploded, literally, the day Sarajevo was destroyed by a homemade nuclear device. The leading democracies transformed into total surveillance states, and the developing world has drowned under a wave of genocides. The mysterious American John Paul seems to be behind the collapse of the world system, and it's up to intelligence agent Clavis Shepherd to track John Paul across the wreckage of civilizations and to find the true heart of darkness—a genocidal organ.
This world has been destroyed once before. In the year 2060, a huge meteor landed in the center of the North Pole causing global disasters, but also bringing opportunities for evolution through "The Crystal From Other Side". Now, humans make their home in the sky in the city of Utopia. But the sky is filled with endless crusades. The Number 85 District, the largest of the sky fortresses, slowly repels the attacks from invading alien forces and terrorists in the shadows. Lu, a young orphan, joins the crew of the Flying Dolphin at the right time. The "Original Impact of Doomsday" symbolizes the beginning of a new world. This is the best and the most beautiful time in the history - until he appears...