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The Karasuma Group (烏丸グループ Karasuma Gurūpu) is a big company in Shinjuku that had made an offer to hire Atsushi Miyano. Since Renya Karasuma is the head of the Black Organization, it can be assumed that the Karasuma Group, obviously founded by Karasuma, is somehow linked to the organization. But, since Gosho Aoyama said in an interview when Karasuma was revealed as the boss, that the real name of the Black Organization and the name of the boss are not related to each other and don't give each other away, the Karasuma Group can't be said to be identical to the organization, nor can the name "Karasuma Group" be the real name of the Black Organization.