2003’s Black Lagoon manga collection is military fiction! it’s a translation! Two, two, two reviews in one!
Although one might argue that this book is at best marginally SF, as the only aspects that seem at all speculative are the alternate laws of physics to which some of the characters appear to have access.
The crew of the repurposed WWII-era torpedo boat Black Lagoon (Vietnam War vet Dutch, nihilistic gun nut Revy, and hacker Benny) don’t bother with the conflicted personal histories of a Drake protagonist or the shiny white aura of a Pournelle mercenary. On the grand moral scale of sell-swords, they’re well towards the unabashed-villains end of the scale. The only reason they’re at all sympathetic is because their enemies are even more depraved (and because the plots conspire to keep them from giving in their their worst impulses).
Enter the unfortunate Rokuro “Rock” Okajima, a salaryman who has the great misfortune to be in possession of a computer disk the Russian Mafia hired the crew of the Black Lagoon to … acquire. The crew have no problem snatching the disk and as an extra cherry on the sundae, they snatch the hapless Okajima as well. Why not? If he proves useless, they can always toss his bullet-riddled corpse over the side.
And it gets worse from there.