Ryo Okajima was originally a young employee of Japan's No. 1 trading company "Rising Sun Heavy Industries". He was well educated, mild-mannered and knowledgeable. During a mission to transport a company's confidential documents by sea, he was ambushed by the BLACK LAGOON Chamber of Commerce targeting the document. After snatching the CD-ROM containing the files, BLACK LAGOON's female gunman, Levy, kidnapped Okajima Midori, ready to demand a ransom from Rising Sun Heavy Industries.
Rising Sun Heavy Industries decided to obliterate CD-ROM and Okajima in order to cover up their illegal transactions. Club cadre Jing Shan brought in mercenaries to attack BLACK LAGOON's torpedo boat, and hinted that Okajima would die in peace on the phone. After learning of the fact that he was abandoned by the company, Okajima advises Dachi, the leader of BLACK LAGOON, to help them get out of the crisis successfully.
Later, Okajima changed his name to Locke and joined the BLACK LAGOON Chamber of Commerce, serving as a series of clerical jobs such as accountants, actuaries, translators, and geographic consultants. Struggling to survive in the darkness of Napra.
