Black Lagoon

This is [Black Lagoon], a representative Japanese hardboiled gangster manga serialized since 2002. The story revolves around the Lagoon Company, a pirate criminal organization disguised as a transport service, set in the fictional lawless city of 'Roanapur' in Southeast Asia. It's a manga that sparked a hardboiled action craze in the 2000s subculture scene, with over 10 million copies in circulation. Due to author Rei Hiroe's depression and personal circumstances, the series has gone through long hiatuses and returns, with each volume taking 2-4 years to be published, showing an extremely slow serialization pace. As far as I know, 13 volumes have been released in Korea. Surprisingly, the author himself has expressed a clear intention to complete the series in interviews and other occasions. With thorough firearm accuracy and thrilling gunfights as its strengths, it's a manga that fans of hardboiled stories will surely enjoy.