Duke Tougou - otherwise known as Golgo 13; he's loved by the ladies, hated by his enemies, is enamored with firepower, and can take out a target from several kilometers away. With an arsenal of weapons at his command, Golgo 13 is hired by a variety of people to take down hijackers and more - but he also must protect himself against those who want to take down the legend himself!
Henrietta is a young girl who works for a "welfare group" that does the government's dirty work. Cybernetically-enhanced and specially-trained, she is one of a group of elite hit-girls, remorseless killers with no memories of their past. Jose, her partner, has taken care of her since she was brought into the organization following the murder of her family, and struggles between his affection for her, and his opposing duty to his employer. But, time is running out.. for with each bullet they fire, Henrietta and the other girls lose a little more of their humanity.
Professional assasins! Both shows are not about Ninjas, but rather modern-day, gun-armed killers. There's a curious simularity between the principal characters, too: they do not feel the slightest remorse for what they do. This is because the Gunslinger Girls have been brainwashed, and because Golgo 13 has a completely inscrutable personality--we never learn his motivations. In both cases, killing people is just a job, nothing personal, you might say. Also, both shows delve into the dark underside of society--crime, corruption, etc. There are no "good guys" in these shows, which is an original and intriguing dramatic technique in itself.
Beppu Yugo is one of the world's most successful and celebrated negotiators. His cases have ranged from big to small, from secretive to in the public eye. His work doesn't come cheap, but his skills are the top of the line, and through words, not violence, his failure rate is minimal. After a period of inactivity, Yugo is back on the job, to help negotiate the release of a hostage in Pakistan. With harsh terrain and deadly enemies before him, will he survive long enough to save the hostage, and return with his life?
While Yugo is more political and Golgo is more of a James Bond-style manly men anime, I still think this is a decent recommendation. Golgo 13 could be renamed as "stand around and do nothing and talk about guns," and Yugo has similar moments (albeit involving politics or other things, usually).
A giant wall looms over Tokyo, shielding the city from a dangerous otherworld called the 'Hell's Gate'. Within the city, things are no less terrifying because Contractors, psychopathic killers with phenomenal powers, have started to appear. These killers are compelled to pay a price every time they use their powers, often in the form of a meaningless or painful task. As their deadly habits rack up a gruesome death toll, Kirihara Misaki and her team from the Foreign Affairs Public Security struggle to solve the cases and bring the Contractors under control. Their task is further confounded by the interference of a masked individual they title Messier Code BK201, a man with abilities that allow him to fight and defeat the Contractors. Who is this BK201? How can the Contractors be stopped permanently? And what does the appearance of the Hell's Gate mean for the people of Tokyo?
Both of the main characters are assassins and have little to no personality while Li keeps a double identiy Golgo 13 does not.
In the world of politics, public officials are abusing their power and using the citizens' hard earned money for their own whims - be it extortion, payoffs, or worse. To combat this problem, the Japanese government created their own version of the FBI: an independent agency with tremendous resources, the Government Crime Investigation Agency! Jotaro Zaizen, GCIA agent, is a manly man who uses a variety of manly means to take down the corrupt and the unjust. With his super-legal privilege Zainers Gold Black card and his trademark saying "da bomb," Jotaro will do whatever it takes to both get the job done and win the ladies.