Mt. Gox Co. principal Mark Karpeles is beyond the reach of a U.S. court where he and the bankrupt bitcoin exchange are being sued for consumer fraud by two American depositors, his attorney told a federal judge.

Karpeles and Tibanne KK, another of his firms named in the lawsuit filed in Chicago federal court in February, will submit papers asking U.S. District Judge Gary Feinerman to rule he has no jurisdiction over them, defense lawyer Eric Macey said in court Monday.

Karpeles, who lives in Japan, has never been to the U.S. and was not properly served with the complaint that started the suit, Macey said after the proceeding. Feinerman gave the lawyer until April 28 to file papers making his arguments.