Kaneshiro is a ruthless, callous, and greedy crime lord, obsessed with accumulating wealth and money. He thinks of himself as a businessman and a banker, as revealed in his Palace, a floating bank and also dedicates a giant room that filled with a large amount of money which disturbs Ryuji Sakamoto and disgusts Makoto Niijima. Makoto claims he's "nothing but a disgusting fly swarming to dirty money" and a "money-grubbing asshole." He claims to have a habit of spending to calm himself down, then blackmailing the persons responsible for his stress to recoup the loss.
Kaneshiro is a mafia boss who rose in the criminal underworld through clever use of blackmail. Even the police cannot do anything against him due to him being highly elusive and well-guarded along with his vast wealth reserves. One of his scams involved having his henchmen asking high school students to deliver an envelope for him to coin lockers for a large paycheck, but the envelope contains drugs and after he delivers the paycheck he will constantly blackmail the victim for ridiculous sums of money with picture proof of the victim delivering the drugged envelope or else he will expose them to their school.
Kaneshiro does not make any attempts to hide his crimes and true personality as he is out the the police's ability of management and thus views himself as an untouchable person, although as mentioned before he is insecure on the inside.
(Source: Megami Tensei Wiki)