Weinberg-Xadium Law was a law firm based in the Alien Zone of Akihabara, Tokyo. (Specifically Akihabara Electric town).
After the bombing of the Weinberg-Mason Law Firm by agents of Caligostro II, which left Harriet Weinberg out of work, Xadium was brought into her law practice as a Defense attorney for metahumans, illegal alien immigrants and others she could not represent in order to supplement her income, as he had a valid Interplanetary Legal Doctorate. (IL.D)
With the help of the alien community, Xadium and Harriet found the Weinberg-Xadium law firm.