This is fairly old or old school. If you check the publishing date, this was made in 1970s. And it shows.
The manga feels similar to "Outer Zone" in storytelling, and has passing resemblance to Mephisto and City Hunter, except that quality level is much lower. What does it mean exactly... the faces are unlike faces in modern manga, and have portrayal is more realistic.... on main character and pretty side characters. However, at the same time, there's a horde of comically proportioned extras everywhere, unlike anything we'd see in manga now. The "realistic" faces resemble visuals of City Hunter, but have less skill, while
the "comically deformed" characters resemble early works of Go Nagai. On occasion the manga tries to draw important scenes with impact and those are done in "increased realism" style with heavy shadows, and that makes them feel similar to ... Mephisto. Except quality level is lower.
And when it comes to storytelling, it resembles Outer Zone, because the story format is rather simplistic (by modern standards) and the stories resolve quickly without a lot of dancing around. Every chapter is self-contained, pretty much, which is baffling at the same time, because the world does not react to some rather horrific events, and in the next chapter nothing happens because of it. The characters are simple, with one pronounced characteristic, and they stick with that.
It is rather difficult to review this work properly, but I can say that this is not great by modern standard. The art style is interesting, but is not amazing even by 1970s standard, is rather lacking. The stories are rather simple, without food for though, comedy, or something that would make you react strongly. Maybe it was great in 1970s, I don't know, but right now they often feel very exagerrated.
If anything, it might be worth checking this for historical value, but don't a masterpiece.